diff --git a/.workbuddy/memory/2026-10-24.md b/.workbuddy/memory/2026-10-24.md
index cb9aff4..a5a176f 100644
--- a/.workbuddy/memory/2026-10-24.md
+++ b/.workbuddy/memory/2026-10-24.md
@@ -104,3 +104,77 @@
 - 测试：death-test 场景 8/9 重写（当帧重生、纯演出不进死亡态、粒子/环/震屏全程自然播完断言），key-test 活着按 R 段重写；全套回归过。
 - 补充（用户六次反馈）：「kid 被动死亡的，死亡动画也应该放完，尽管玩家很快按了重生键」。根因：`softReset()` 无脑清 particles+shake——重生即清场，特效被腰斩。修复：softReset 永久不清粒子/震屏（"演出层"语义：重生只重置关卡逻辑状态，不掐断演出；仅 reset(true) 整关重开才清空）。keepFX 参数随之删除，respawn() 恢复无参。踩坑：python 替换时把 `softReset(keepFX=false){` 函数头和 vanish/bullets 清逻辑一起吃进 old 串，文件语法损坏——已修复（补回函数头+4 行清逻辑，node import 验证）。教训：rep() 的 old 串跨函数签名行时，new 必须原样带回签名与后续语句。
 - 测试：death-test 新增场景 10（真死亡 3 帧秒按 R：粒子/环/震屏全程保留并自然播完，7 断言）；key-test 死亡中按 R 段加"残余粒子"断言；全套回归过。
+
+## Flutter 全平台复刻（app/ 目录）——集成层收口，`flutter analyze` 0 error
+- 目标：把 `tmp/` 下 web 源码 100% 复刻成 Flutter（android+macos+linux+windows+ios），手感/UI/功能全保留。
+- 集成层全部落地并通过静态分析：
+  - `world.dart` = main.js 的状态机+固定 60Hz 时间步长循环（STEP=1000/60，guard<6，P.update(1) 定步长保手感）；GameHost 回调接口 + LevelTestRunner。
+  - `app_root.dart`：`SingleTickerProviderStateMixin`+`Ticker` 驱动 `world.tick`；`RawKeyboard` 监听 → `Input.onKey(logicalKey.debugName 去空格, isDown)`（debugName 与 web `KeyboardEvent.code` 字符串一致：ArrowLeft/KeyA/ShiftLeft/KeyR/Backspace/Escape…）；9 个 GameHost 方法接 UI。
+  - `game_canvas.dart` 信箱缩放（800×608 虚拟→适配保留比例）；`overlays.dart` HUD/BOSS 条/吐司；`screens.dart` 标题/选关/暂停/结算/设置（含键位重绑 Focus.onKeyEvent 捕获 + 用户名）；`touch_layout.dart`+`touch_controls.dart` 虚拟手柄（android 默认开）；`editor_panel.dart` 关卡编辑器（多面地图+属性面板，1:1 editor.js）。
+  - `save.dart` 加 settings 槽 + flush；`levels.dart` 从 `assets/levels.json`（23 关，已注册 pubspec）加载；`main.dart` = `runApp(AppRoot)`。
+- 修复的编译错误：缺 `material.dart`/`scheduler.dart`/`foundation.dart` 导入（Ticker/MaterialApp/ValueListenable/defaultTargetPlatform/KeyDownEvent）；`_onKeyCapture` 改 `(FocusNode, KeyEvent)→KeyEventResult`；`debugName` 可空用 `?.replaceAll() ?? ''`；`levelsReload` 改 `ValueNotifier<int>` 避免越权调 notifyListeners；清掉未用导入/变量。
+- **环境限制**：本沙箱拦截 Flutter 写 `/opt/flutter/bin/cache/engine.stamp.tmp`，故 `flutter build`（任何原生平台）无法在此跑通——仅能做静态 `flutter analyze`（已 0 error）。原生构建需用户在自有机器上跑（SDK 可写）。
+- 待办（用户机器）：`flutter pub get` → `flutter build <平台>`；若需 iOS 触屏检测可拓宽 `_useTouch`（现仅 android）；`withOpacity` 弃用警告可后续换 `withValues`。
+
+## Flutter 安卓「打开后黑屏」排障与加固（同日）
+- 报告：安卓打开后是黑屏。排查路径（静态读代码 + 实证 widget 测试）：
+  - **已排除**：`levels.json` 顶层是合法 `{"levels":[...]}`（非数组，decode 不抛）；`EditorController()` 是空构造；`Save.load()`/`loadLevels()`/`Input.endFrame()`/`metaSettings()['touch'] as Map` 均安全；`MainActivity` 是标准 `FlutterActivity`、manifest/styles 无改动无资源引用；`_MenuBg` 只是渐变 Container，`TouchControls` 在 `visible=false` 时不渲染。
+  - **实证**：新增 `test/title_render_test.dart`，在 1080×2340 虚拟窗口真实 pump `AppRoot`，断言标题三按钮与"23 个内置关卡"文案可见、不卡加载态、无错误界面 → **全部通过**。证明启动逻辑与 build 本身没问题（`flutter test` 全 3 项绿）。
+- 结论：黑屏属**设备级渲染问题**，最可能是 Android 默认 Impeller（Vulkan）后端处理「每帧 scale+clipRect+渐变 shader 的 CustomPaint」时整帧丢失，会连普通 widget 一起黑掉。
+- 修复/加固：
+  1. **`AndroidManifest.xml` 的 `<application>` 下加 `EnableImpeller=false`**（Flutter 官方关闭方式，置「逐帧重绘自定义 Canvas」避免 OEM ROM/Impeller 黑屏；确认正常后可改回 true）。
+  2. **`game_canvas.dart`**：去掉 `isComplex:true`（我们每帧重绘，缓存有害）——最可能致设备 blank 的元凶；去掉 `CustomPaint(size: Size.infinite)` 改 `SizedBox.expand`（零/无穷尺寸会算出 scale=0 让整屏消失）；paint 里加 `size/scale` 有限性与正数校验。
+  3. **新增 `core/app_error.dart`**：全局错误收口。`main.dart` 装 `FlutterError.onError` + `ErrorWidget.builder` + `runZonedGuarded`，任何异常都切到可读错误详情界面（release 包原本静默吞异常只剩黑屏）。区分 `report`（致命，占屏）与 `warn`（非致命，仅 logcat）。
+  4. **`app_root.dart`**：`_init()` 改分阶段 try/catch——存档/关卡失败用 `warn` 降级继续（不再导致 `_ready` 永假、永久停黑屏）；世界装配失败才 `report`；加 12s 看门狗超时报错；加载态换成带 CircularProgressIndicator 的 `_BootScreen`（原为近黑空 Scaffold）；build 三级优先级：错误详情 → 加载界面 → `_buildGame()`。
+  5. `game_canvas` 的 `world.render` 包 try/catch 上报渲染异常。
+- 验证：`flutter analyze` **0 error / 0 warning**（余 206 条为 info 级 lint）；`flutter test` 3/3 通过；manifest XML 通过 python ElementTree 校验。
+
+### 安卓黑屏 → 真凶定位（第二轮，同日）
+- 用户二次反馈：**改后仍打不开，启动循环报 `View.of() was called with a context that does not contain a View widget.`**
+- **根因确认（我上一轮自己引入的回归）**：为套 `runZonedGuarded` 我把 `main.dart` 的 `runApp(AppRoot())` 换成了底层 `binding.scheduleAttachRootWidget(const AppRoot())`，**漏掉了 `binding.wrapWithDefaultView(...)`**。
+  - SDK 源码（`packages/flutter/lib/src/widgets/binding.dart`）为证：
+    `void runApp(Widget app) { final b = WidgetsFlutterBinding.ensureInitialized(); _runWidget(b.wrapWithDefaultView(app), b, 'runApp'); }`
+    `void _runWidget(app, b, entry) { assert(b.debugCheckZone(entry)); b..scheduleAttachRootWidget(app)..scheduleWarmUpFrame(); }`
+  - `wrapWithDefaultView` 负责注入 `View` 祖先 + 提供隐式 `FlutterView`；缺了它，`MaterialApp` 内部一调 `View.of(context)` 就抛上述错误。官方 `runWidget` 的文档也明写"缺 View 祖先会出错"。
+- **不要改回 `runApp` 塞进 `runZonedGuarded`**：`debugCheckZone` 会比较 `Zone.current` 与 binding 初始化时的 `_debugBindingZone`，不一致会抛 **"Zone mismatch"**（`foundation/binding.dart` 有实现）。故保留"复刻 runApp 但不带 assert"的写法最稳。
+- 修复后 `main.dart`：
+  ```dart
+  final binding = WidgetsFlutterBinding.ensureInitialized();
+  FlutterError.onError = ...; ErrorWidget.builder = ...;
+  runZonedGuarded(() {
+    binding
+      ..scheduleAttachRootWidget(binding.wrapWithDefaultView(const AppRoot()))
+      ..scheduleWarmUpFrame();
+  }, (e, st) => AppError.reportZone(e, st));
+  ```
+- 加固：`AppError.buildScreen` 外层包 `Directionality`。**ErrorWidget 在很早期替换出错 widget 时树里可能还没有 Directionality**，缺了会引发二次报错盖住真正原因（血泪点）。
+- **方法论教训**：widget 测试（`tester.pumpWidget`）由测试框架自己注入 View，**永远无法覆盖 `main()` 里的 bootstrap 问题**。改动启动流程必须真机构建验证，不能只看 `flutter analyze` + widget 测试全绿。
+
+### 安卓黑屏 → 真凶终于抓到（第三轮，同日，已收敛）
+- **真凶：`Positioned` 被 `ValueListenableBuilder` 包裹**，不是 Stack 的直接子级 → 定位数据被丢弃 → 整棵 Stack 布局横向塌缩成 0 宽。
+  - 实证（探针测试量的真实尺寸，不是靠猜）：修复前 `button size=Size(0.0, 92.0)`、`title text found: 0`、画布 `0.0×0.0`；修复后 `canvas rendered: size=1080.0x2340.0 scale=1.35`、按钮 `64.4×23` 居中 (507.8, 1151.5)。
+  - 界面上只剩画布里那条近黑渐变 `#181828→#08080f`，看着就是"黑屏"。这也解释了为什么 widget 测试能 `find` 到按钮却依然黑：`find` **不检查可见性**。
+  - 涉及位置：`app_root._buildGame` 的四个屏幕分支（已改为 Positioned 在外、监听在内）；**`overlays.dart` HudOverlay 的 HUD 行 / BOSS 血条 / Toast 三处同样踩坑**（HUD 塌缩），`_BossBar` 改为只返回内容（`Column`），定位交给外层 `Positioned`。
+- 回退前两轮的推测性改动（已证明无关，留着只会有副作用）：`MainActivity` 恢复默认 `FlutterActivity`（SurfaceView，不要强制 Texture）；**删除 manifest 里的 `EnableImpeller=false`**（官方已弃用，且本作与此无关）。
+- **顺带挖出的真功能 bug：进关卡后 HUD 永远不显示**。原因：`showHud` 在 `_buildGame()` 里读 `world.state`，而 `startLevel()` 只改 World 字段、不触发 AppRoot 重建。
+  - 修法：`World.state` 改为 `ValueNotifier<String> stateN` 的 getter/setter（`menu|playing|paused|result|editor`），HUD 用 `ValueListenableBuilder<String>(valueListenable: world.stateN, ...)` 驱动。
+  - 教训：web 版主循环每帧直接改 DOM 所以没这个问题；**Flutter 侧凡是"某状态决定某子树显隐"，该状态就必须是可监听的**。
+- **音频异常会整死 App**：audioplayers 的 `MissingPluginException` 会在别的 Zone 上下文冒出来，`Sfx._play` 内的 try/catch 抓不到，冒泡到全局钩子后整个界面被切成错误详情。
+  - 加固：`Sfx.broken` 一旦出错永久静音；`init()`/`unlock()` 加 try/catch 且 `unlock()` 在 `!enabled` 时直接 return；`AppError.reportZone` 对 `MissingPluginException + audioplayers/xyz.luan` 降级为 warn。**原则：音频坏掉 ≠ 游戏坏掉。**
+- 渲染容错策略调整：`world.render` 单帧异常只 warn（连续 60 帧才升级占屏），避免偶发一帧就把整局判死。
+- **手感 1:1 已用测试锁死**（`test/gameplay_test.dart`，无头、固定步长，直接调 `world.tick`）：
+  - web 版顺序是「本帧 `vy = -JUMP` 后**立刻**加一次重力」，所以第一帧读到 `-6.35` 而非 `-6.6`；Dart 侧完全一致（别再写错断言）。
+  - 松键可变跳跃：`!is('jump') && vy < -3` 收紧到 -3，再加一帧重力 → `-2.75`。
+  - 死亡后不自动重生、按 R 才回存档点（`deaths` +1）。
+- **把"布局塌缩"固化成回归测试**（`test/title_render_test.dart`，5 个用例）：断言 `tester.getSize()` 的**可见尺寸**（Width > 0）而不是"widget 存在"；另加端到端「标题 → 关卡选择 → 点卡进关 → HUD 显示关卡名」。注意游戏有常驻 Ticker，**测试里不能用 `pumpAndSettle`**（会超时）。
+- 当前状态：`flutter analyze` **0 error / 0 warning**；`flutter test` **10/10 通过**。原生构建仍被沙箱拦（同前：Flutter 无法写 `/opt/flutter/bin/cache/engine.stamp.tmp`），需用户在自己机器上 `flutter build apk`。
+
+### Flutter 收尾：安卓横屏锁定 + 弃用清理（同日，最终态）
+- **安卓仅横屏（用户：「安卓平台不能竖屏，只能横屏玩，你重新适应一下」）**：
+  - `android/app/src/main/AndroidManifest.xml` 的 `<activity>` 加 `android:screenOrientation="sensorLandscape"` + `android:resizeableActivity="false"`（冷启动首帧即横屏，避免先竖后横闪烁）。
+  - `lib/main.dart` 在 `runZonedGuarded` 内对 android/iOS 调 `SystemChrome.setPreferredOrientations([landscapeLeft, landscapeRight])`（桌面端不干预）。
+  - `game_canvas.dart` 提取 `static Rect letterboxRect(Size)` 供画布与触屏共用；`touch_controls.dart` 用 `letterboxRect(MediaQuery.size)` 把虚拟手柄按钮锚定在画面区内（不再漂到黑边）。
+  - 新增 `test/title_render_test.dart` 横屏用例（2340×1080）：画布非 0 宽、手柄按钮落在 `stage` 内。
+- **`withOpacity` 弃用清理**：5 处换成 `Color.withValues(alpha: o*255)`（本 SDK Dart 3.12 的 `withValues` 只有 `alpha` 参数、无 `opacity`；`opacity` 写法会编译失败，已实测回退）。`RawKeyboard` 等其余弃用属输入层 API、仍可用、保持不动（重写风险大收益小）。
+- **最终确认**：`flutter analyze` **0 error**（约 201 条 info 级 lint，主要是 web 常量大写命名 style，不影响构建）；`flutter test` **13/13 通过**（gameplay 物理保真 4 项 + title 渲染/横屏/手柄 8 项 + AppRoot smoke 1 项）。物理保真：JUMP 6.6/GRAV 0.25、可变跳高、死亡不自动重生按 R 回存档点均与 web 一致。
+- **用户侧交付**：本沙箱无法跑原生构建，需用户在本地 `app/` 执行 `flutter pub get` → `flutter build apk`（安卓）/ `flutter build macos` / `flutter build linux` / `flutter build windows`；iOS 触屏检测仍可拓宽。
diff --git a/.workbuddy/memory/MEMORY.md b/.workbuddy/memory/MEMORY.md
index 0fa1b4c..f9936bf 100644
--- a/.workbuddy/memory/MEMORY.md
+++ b/.workbuddy/memory/MEMORY.md
@@ -60,3 +60,14 @@
 - 仅在 `playing` 态显示（`startLevel`/`resume` 显示，菜单/暂停/结算隐藏）；HUD 每帧 `Touch.setGun(P.hasGun)` 控制射击键置灰。
 - 若改键位含义，记得同步 `js/input.js` 的 `BIND` 与 `touch.js` 的 `HELD`/`api` 映射。
 
+## Flutter 移植版（`app/`，脱胎于本 web 源码）
+目标是 android+macos+linux+windows 四平台 100% 复刻 UI/功能/手感。核心约定：
+- **渲染**：自定义 `Ticker` + `CustomPaint`，信箱缩放 800×608 → 适配屏幕；`GameCanvas` 用 `SizedBox.expand`（不要用 `Size.infinite`，零尺寸会让 scale=0 整屏消失）。
+- **循环**：`World.tick(dt)` 固定 60Hz 累加器（`STEP=1000/60`），`Player.update(1)` 定步长 —— 手感 1:1 的关键，别改成 dt 缩放。
+- **输入**：Flutter 按键经 `LogicalKeyboardKey.debugName` 去空格 → 喂给 `Input.onKey()`，得到与 web `KeyboardEvent.code` 完全相同的字符串（`ShiftLeft/KeyZ/KeyR/Backspace/Escape`）。
+- **`Positioned` 必须是 `Stack` 的直接子级**（血泪）：把它写在 `ValueListenableBuilder.builder` 的返回值里会丢弃定位数据 → 子树横向塌缩为 0 宽 → 表现为"黑屏"。一律写成 `Positioned(child: ValueListenableBuilder(...))`。
+- **凡是"某状态决定某子树显隐"，该状态必须可监听**：`World.state` 已改由 `ValueNotifier<String> stateN` 承载（曾在 `build()` 里读普通字段导致 HUD 永不出现）。
+- **音频不能拖垮游戏**：`Sfx` 有 `broken` 永久静音开关；`AppError.reportZone` 会把 audioplayers 的插件噪声降级为日志。
+- **测试**：widget 测试永远覆盖不到 `main()` 的 bootstrap；断言要用 `tester.getSize()` 查**可见尺寸**（`find` 不查可见性）。游戏有常驻 Ticker → **禁用 `pumpAndSettle`**。原生构建需真实机器；本沙箱 Flutter 写不了自己的 `/opt/flutter/bin/cache` 缓存。
+- 手感回归请跑 `flutter test`（含 `test/gameplay_test.dart` 的跳初速/重力/松手-guard/死亡重生断言）。
+
diff --git a/app/.gitignore b/app/.gitignore
new file mode 100644
index 0000000..3820a95
--- /dev/null
+++ b/app/.gitignore
@@ -0,0 +1,45 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.build/
+.buildlog/
+.history
+.svn/
+.swiftpm/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+/coverage/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
diff --git a/app/.metadata b/app/.metadata
new file mode 100644
index 0000000..cf4b47a
--- /dev/null
+++ b/app/.metadata
@@ -0,0 +1,45 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "c9a6c484230f8b5e408ec57be1ef71dee1e77020"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+    - platform: android
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+    - platform: ios
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+    - platform: linux
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+    - platform: macos
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+    - platform: web
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+    - platform: windows
+      create_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+      base_revision: c9a6c484230f8b5e408ec57be1ef71dee1e77020
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
diff --git a/app/README.md b/app/README.md
new file mode 100644
index 0000000..d4ce680
--- /dev/null
+++ b/app/README.md
@@ -0,0 +1,17 @@
+# iwbtc
+
+A new Flutter project.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Learn Flutter](https://docs.flutter.dev/get-started/learn-flutter)
+- [Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Flutter learning resources](https://docs.flutter.dev/reference/learning-resources)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.
diff --git a/app/analysis_options.yaml b/app/analysis_options.yaml
new file mode 100644
index 0000000..0d29021
--- /dev/null
+++ b/app/analysis_options.yaml
@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/app/android/.gitignore b/app/android/.gitignore
new file mode 100644
index 0000000..be3943c
--- /dev/null
+++ b/app/android/.gitignore
@@ -0,0 +1,14 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+.cxx/
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/to/reference-keystore
+key.properties
+**/*.keystore
+**/*.jks
diff --git a/app/android/app/build.gradle.kts b/app/android/app/build.gradle.kts
new file mode 100644
index 0000000..ac99811
--- /dev/null
+++ b/app/android/app/build.gradle.kts
@@ -0,0 +1,45 @@
+plugins {
+    id("com.android.application")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+}
+
+android {
+    namespace = "com.iwbtc.iwbtc"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId = "com.iwbtc.iwbtc"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutter.versionCode
+        versionName = flutter.versionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.getByName("debug")
+        }
+    }
+}
+
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}
+
+flutter {
+    source = "../.."
+}
diff --git a/app/android/app/src/debug/AndroidManifest.xml b/app/android/app/src/debug/AndroidManifest.xml
new file mode 100644
index 0000000..399f698
--- /dev/null
+++ b/app/android/app/src/debug/AndroidManifest.xml
@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
diff --git a/app/android/app/src/main/AndroidManifest.xml b/app/android/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..9bc0e8f
--- /dev/null
+++ b/app/android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,51 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
+        android:label="iwbtc"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <!-- 屏幕方向：游戏画面是 800×608 的横向舞台，竖屏下信箱缩放后画面极小、
+             虚拟手柄也会挤在一起，故安卓端锁定横屏。
+             sensorLandscape：左横/右横都允许，跟随重力（只保留一个方向就写 landscape）。
+             Dart 侧 SystemChrome 也会再锁一次，两者共同保证冷启动首帧即为横屏。 -->
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:taskAffinity=""
+            android:theme="@style/LaunchTheme"
+            android:screenOrientation="sensorLandscape"
+            android:resizeableActivity="false"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
+</manifest>
diff --git a/app/android/app/src/main/kotlin/com/iwbtc/iwbtc/MainActivity.kt b/app/android/app/src/main/kotlin/com/iwbtc/iwbtc/MainActivity.kt
new file mode 100644
index 0000000..009fc6d
--- /dev/null
+++ b/app/android/app/src/main/kotlin/com/iwbtc/iwbtc/MainActivity.kt
@@ -0,0 +1,5 @@
+package com.iwbtc.iwbtc
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity : FlutterActivity()
diff --git a/app/android/app/src/main/res/drawable-v21/launch_background.xml b/app/android/app/src/main/res/drawable-v21/launch_background.xml
new file mode 100644
index 0000000..f74085f
--- /dev/null
+++ b/app/android/app/src/main/res/drawable-v21/launch_background.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>
diff --git a/app/android/app/src/main/res/drawable/launch_background.xml b/app/android/app/src/main/res/drawable/launch_background.xml
new file mode 100644
index 0000000..304732f
--- /dev/null
+++ b/app/android/app/src/main/res/drawable/launch_background.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>
diff --git a/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 0000000..db77bb4
Binary files /dev/null and b/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 0000000..17987b7
Binary files /dev/null and b/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 0000000..09d4391
Binary files /dev/null and b/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 0000000..d5f1c8d
Binary files /dev/null and b/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 0000000..4d6372e
Binary files /dev/null and b/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/values-night/styles.xml b/app/android/app/src/main/res/values-night/styles.xml
new file mode 100644
index 0000000..06952be
--- /dev/null
+++ b/app/android/app/src/main/res/values-night/styles.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>
diff --git a/app/android/app/src/main/res/values/styles.xml b/app/android/app/src/main/res/values/styles.xml
new file mode 100644
index 0000000..cb1ef88
--- /dev/null
+++ b/app/android/app/src/main/res/values/styles.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>
diff --git a/app/android/app/src/profile/AndroidManifest.xml b/app/android/app/src/profile/AndroidManifest.xml
new file mode 100644
index 0000000..399f698
--- /dev/null
+++ b/app/android/app/src/profile/AndroidManifest.xml
@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
diff --git a/app/android/build.gradle.kts b/app/android/build.gradle.kts
new file mode 100644
index 0000000..dbee657
--- /dev/null
+++ b/app/android/build.gradle.kts
@@ -0,0 +1,24 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+val newBuildDir: Directory =
+    rootProject.layout.buildDirectory
+        .dir("../../build")
+        .get()
+rootProject.layout.buildDirectory.value(newBuildDir)
+
+subprojects {
+    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
+    project.layout.buildDirectory.value(newSubprojectBuildDir)
+}
+subprojects {
+    project.evaluationDependsOn(":app")
+}
+
+tasks.register<Delete>("clean") {
+    delete(rootProject.layout.buildDirectory)
+}
diff --git a/app/android/gradle.properties b/app/android/gradle.properties
new file mode 100644
index 0000000..e96108c
--- /dev/null
+++ b/app/android/gradle.properties
@@ -0,0 +1,6 @@
+org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
+android.useAndroidX=true
+# This newDsl flag was added by the Flutter template
+android.newDsl=false
+# This builtInKotlin flag was added by the Flutter template
+android.builtInKotlin=false
diff --git a/app/android/gradle/wrapper/gradle-wrapper.properties b/app/android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..2d428bf
--- /dev/null
+++ b/app/android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip
diff --git a/app/android/settings.gradle.kts b/app/android/settings.gradle.kts
new file mode 100644
index 0000000..c21f0c5
--- /dev/null
+++ b/app/android/settings.gradle.kts
@@ -0,0 +1,26 @@
+pluginManagement {
+    val flutterSdkPath =
+        run {
+            val properties = java.util.Properties()
+            file("local.properties").inputStream().use { properties.load(it) }
+            val flutterSdkPath = properties.getProperty("flutter.sdk")
+            require(flutterSdkPath != null) { "flutter.sdk not set in local.properties" }
+            flutterSdkPath
+        }
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id("dev.flutter.flutter-plugin-loader") version "1.0.0"
+    id("com.android.application") version "9.0.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.3.20" apply false
+}
+
+include(":app")
diff --git a/app/assets/levels.json b/app/assets/levels.json
new file mode 100644
index 0000000..b3942be
--- /dev/null
+++ b/app/assets/levels.json
@@ -0,0 +1,1186 @@
+{
+  "levels": [
+    {
+      "id": "t1",
+      "name": "FIRST STEPS",
+      "type": "jump",
+      "diff": 1,
+      "bg": "jump",
+      "width": 36,
+      "hint": "← → 移动，Shift / Z / 空格跳跃。刺碰到就死，R 键重来。",
+      "messages": [
+        "← → 移动　Shift 跳跃　R 重来"
+      ],
+      "grid": [
+        "####################################",
+        "#..................................#",
+        "#..................................#",
+        "#..................................#",
+        "#..................................#",
+        "#..................................#",
+        "#..................................#",
+        "#.............................X....#",
+        "#............................#####.#",
+        "#..................................#",
+        "#.........................#####....#",
+        "#..................................#",
+        "#.....................#####........#",
+        "#..................................#",
+        "#.................#####............#",
+        "#..................................#",
+        "#............#####.................#",
+        "#.S.T..^^^............G............#",
+        "####################################"
+      ],
+      "index": 0,
+      "builtin": true
+    },
+    {
+      "id": "t2",
+      "name": "DOUBLE JUMP",
+      "type": "jump",
+      "diff": 1,
+      "bg": "custom",
+      "width": 40,
+      "hint": "空中再按一次跳跃＝二段跳。5 格宽的刺坑只能靠二段跳过去。",
+      "messages": [
+        "空中再按一次 Shift ＝ 二段跳"
+      ],
+      "grid": [
+        "########################################",
+        "#......................................#",
+        "#......................................#",
+        "#......................................#",
+        "#......................................#",
+        "#......................................#",
+        "#......................................#",
+        "#......................................#",
+        "#..................X...................#",
+        "#.................####.................#",
+        "#......................................#",
+        "#.........................####.........#",
+        "#......................................#",
+        "#.................####.................#",
+        "#......................................#",
+        "#.........................####.........#",
+        "#......................................#",
+        "#.................####.................#",
+        "#.S.T......^^^^^...G...................#",
+        "########################################"
+      ],
+      "index": 1,
+      "builtin": true
+    },
+    {
+      "id": "j1",
+      "name": "SPIKE ALLEY",
+      "cn": "刺巷",
+      "type": "jump",
+      "diff": 2,
+      "hint": "针刺入门：刺毯单跳节奏、钻石缝、矮洞撞头跳、竖井、对刺门。",
+      "width": 104,
+      "grid": [
+        "########################################################################################################",
+        "#......................................................................................................#",
+        "#......................................................................................................#",
+        "#......................................................................................................#",
+        "#......................................................................................................#",
+        "#......................................................................................................#",
+        "#................................................................................vvvvvvvvvvvvvvv.......#",
+        "#......................................................................................................#",
+        "#......................................................................................................#",
+        "#......................................................................................................#",
+        "#..............................................................................#.......................#",
+        "#..............................................................................#..G^.^^.^..>^<G^.......#",
+        "#.........................................................................#....###################.....#",
+        "#.........................................................................###..#.......................#",
+        "#.........................................................................#....#.......................#",
+        "#.........................................................................>....#...................>...#",
+        "#.........vvvvvvvvvvvvvvvvv.vvvvvvvvvvvvvvvv..............................#..###...................>...#",
+        "#.........................................................................#....<...................>..<#",
+        "#...........................................#############..........#......#....#...................>..<#",
+        "#..............v.....v........v...v...v......................#.....#.......##..#...................>..<#",
+        "#.........................................................#..#..#..#..#........#......................<#",
+        "#..S....G.^^^..^..^..^..^.^.G.^...^...^..^^..G.>.<..>^<...#..#..#..#..#.G......#....................X..#",
+        "#########################################################..............#################################",
+        "#........................................................^^^^^^^^^^^^^^................................#",
+        "#......................................................................................................#",
+        "########################################################################################################"
+      ],
+      "index": 2,
+      "builtin": true
+    },
+    {
+      "id": "j2",
+      "name": "VERTICAL HELL",
+      "cn": "垂直地狱",
+      "type": "jump",
+      "diff": 3,
+      "hint": "52 格高塔：四段之字竖井，每层刺毯+上下夹缝，垂刺压顶、掉落刺追身。",
+      "width": 68,
+      "grid": [
+        "####################################################################",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#..................................................................#",
+        "#.................D...............D.....................D..........#",
+        "#..........vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv......#",
+        "#..................................................................#",
+        "#.......................................v..........................#",
+        "#..................................................................#",
+        "#..........^.^.^^.^^.^^..>.G..^^.^^.^^..^..^.^^.^^.G.<.^.^^.^^X....#",
+        "##..##############################################################.#",
+        "##.......#.........................................................#",
+        "#######..#....D.........D.........D.........D......................#",
+        "##......^#vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv............#",
+        "##..######.........................................................#",
+        "##^...................v.................v..........................#",
+        "#######............................................................#",
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+    {
+      "id": "j3",
+      "name": "TIGHTROPE",
+      "cn": "钢丝",
+      "type": "jump",
+      "diff": 3,
+      "hint": "一格宽的柱子立在刺海上，高矮间距都不同，垂刺压着头顶。",
+      "width": 132,
+      "grid": [
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+    {
+      "id": "j4",
+      "name": "ICE NEEDLES",
+      "cn": "冰刺",
+      "type": "jump",
+      "diff": 4,
+      "hint": "冰面刹不住车：滑坑、冰上钻石、冰柱钢丝，最后还有一段冰顶矮洞。",
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+    {
+      "id": "j5",
+      "name": "THE GAUNTLET",
+      "cn": "关口",
+      "type": "jump",
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+      "hint": "移动平台跨刺海，炮台点名，矮洞与钻石阵穿插。",
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+      "name": "NEEDLE CATHEDRAL",
+      "cn": "针刺教堂",
+      "type": "jump",
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+      "hint": "三层殿堂：底层向右，竖井爬升，中层折返向左，再爬升，顶层冲刺。",
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+      "id": "j7",
+      "name": "SKY SPIKES",
+      "cn": "天降刺",
+      "type": "jump",
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+      "hint": "之字爬塔，每层头顶悬着掉落刺。走近就掉。别停。",
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+      "id": "j8",
+      "name": "TRIPLE THREAT",
+      "cn": "三重威胁",
+      "type": "jump",
+      "diff": 4,
+      "hint": "冰面滑行、塌陷浮桥、单向台攀爬三连考，中间不许喘气。",
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+    {
+      "id": "j9",
+      "name": "CHERRY BLOSSOM",
+      "cn": "樱花",
+      "type": "jump",
+      "diff": 5,
+      "hint": "双层结构收 3 个苹果：钻石缝中央一个，矮洞里一个，中层对刺门后一个。",
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+    {
+      "id": "j10",
+      "name": "FINAL NEEDLE",
+      "cn": "毕业针刺",
+      "type": "jump",
+      "diff": 5,
+      "hint": "四层大考场：刺毯长廊 → 冰面折返 → 矮洞 → 高空钢丝。全程无尿点。",
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+      "builtin": true
+    },
+    {
+      "id": "e1",
+      "name": "LONG ROAD",
+      "type": "endur",
+      "diff": 3,
+      "bg": "endur",
+      "width": 100,
+      "hint": "100 格长路，8 个刺坑，只有 5 个存档点。别急。",
+      "messages": [
+        "才刚刚开始"
+      ],
+      "grid": [
+        "####################################################################################################",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#..............v.v............v.v......................v.v.................v.v.....................#",
+        "#..........................................F..............................................F........#",
+        "#........................................######.........................................######.....#",
+        "#..................................................................................................#",
+        "#..................................................................................................#",
+        "#.S.............G.........^^..G.........^^..........G..........^^...........G.^^..................X#",
+        "##########^^^#######^^^^###########^^^######^^^^^#########^^^########^^^^##########^^^######^^^^^###"
+      ],
+      "index": 12,
+      "builtin": true
+    },
+    {
+      "id": "e2",
+      "name": "TURRET HELL",
+      "type": "endur",
+      "diff": 4,
+      "bg": "endur",
+      "width": 88,
+      "hint": "炮台沿路扫射。踩空就是刺海，别站在开阔地。",
+      "turrets": [
+        {
+          "dir": "right",
+          "period": 78,
+          "speed": 2.8,
+          "offset": 0
+        },
+        {
+          "dir": "left",
+          "period": 92,
+          "speed": 2.6,
+          "offset": 25
+        },
+        {
+          "dir": "right",
+          "period": 70,
+          "speed": 3,
+          "offset": 10
+        },
+        {
+          "dir": "left",
+          "period": 86,
+          "speed": 2.7,
+          "offset": 40
+        },
+        {
+          "dir": "right",
+          "period": 74,
+          "speed": 2.9,
+          "offset": 20
+        },
+        {
+          "dir": "aim",
+          "period": 110,
+          "speed": 2.4,
+          "offset": 55
+        }
+      ],
+      "grid": [
+        "########################################################################################",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#......................................................................................#",
+        "#..................................................................................X...#",
+        "#.................................................................................######",
+        "#......................................................................................#",
+        "#.............................................................................#####....#",
+        "#......................................................................................#",
+        "#..................................................................................G...#",
+        "#.................................................................................######",
+        "#......................................................................................#",
+        "#.............................................................................#####....#",
+        "#......................................................................................#",
+        "#.S.O.....G.........O.........G.....O.............G.O...............O.G.............O..#",
+        "#.#####...#####...#####...#####...#####...#####...#####...#####...#####...#####...######",
+        "#^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^#",
+        "########################################################################################"
+      ],
+      "index": 13,
+      "builtin": true
+    },
+    {
+      "id": "e3",
+      "name": "THE PIT",
+      "type": "endur",
+      "diff": 4,
+      "bg": "endur",
+      "width": 64,
+      "hint": "先从左侧竖井下到底，游过水下刺池，再从右边一路爬回顶端。",
+      "messages": [
+        "下面有东西在等你"
+      ],
+      "grid": [
+        "################################################################",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#........................................................X.....#",
+        "#..S....................................................########",
+        "#.#######......................................................#",
+        "#..................................................G...........#",
+        "#................................................#######.......#",
+        "#..........#######.............................................#",
+        "#..........................................................G...#",
+        "#...G...................................................########",
+        "#.#######......................................................#",
+        "#..................................................G...........#",
+        "#................................................#######.......#",
+        "#..........#######.............................................#",
+        "#..............................................................#",
+        "#...G...................................................########",
+        "#.#######......................................................#",
+        "#..............................................................#",
+        "#................................................#######.......#",
+        "#..........#######.............................................#",
+        "#..............................................................#",
+        "#............G..........................................########",
+        "#..........#######.............................................#",
+        "#..................................................G...........#",
+        "#.................~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#######.......#",
+        "#.................~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~..............#",
+        "#.................~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~..............#",
+        "#^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^#",
+        "################################################################"
+      ],
+      "index": 14,
+      "builtin": true
+    },
+    {
+      "id": "e4",
+      "name": "MARATHON",
+      "type": "endur",
+      "diff": 5,
+      "bg": "endur",
+      "width": 120,
+      "hint": "120 格：冰面、炮台、刺坑、移动平台全都有。5 个存档，自求多福。",
+      "turrets": [
+        {
+          "dir": "right",
+          "period": 76,
+          "speed": 2.9,
+          "offset": 0
+        },
+        {
+          "dir": "left",
+          "period": 88,
+          "speed": 2.7,
+          "offset": 30
+        },
+        {
+          "dir": "right",
+          "period": 68,
+          "speed": 3.1,
+          "offset": 15
+        },
+        {
+          "dir": "aim",
+          "period": 120,
+          "speed": 2.3,
+          "offset": 50
+        },
+        {
+          "dir": "left",
+          "period": 80,
+          "speed": 2.8,
+          "offset": 25
+        }
+      ],
+      "grid": [
+        "########################################################################################################################",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#...................v.v.............v.v.............v.v...............v.v...............v.v.............v.v............#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#......................................................................................................................#",
+        "#.S..............^^.O...G...........O...G...........O.^^..........G...O.^^..............G...........O...G^^.........X..#",
+        "#%%%%%%%%%%^^^^############^^^^^%%%%%%%%%%%%^^^^##########^^^^^###############^^^^%%%%%%%%%%^^^^^############^^^^#######",
+        "########################################################################################################################"
+      ],
+      "movers": [
+        {
+          "x": 57,
+          "y": 22,
+          "w": 3,
+          "h": 1,
+          "path": [
+            [
+              57,
+              22
+            ],
+            [
+              63,
+              22
+            ]
+          ],
+          "speed": 1.3
+        }
+      ],
+      "index": 15,
+      "builtin": true
+    },
+    {
+      "id": "b1",
+      "name": "THE GUY",
+      "type": "boss",
+      "diff": 3,
+      "bg": "boss",
+      "width": 48,
+      "hint": "X 键射击。他放扇形弹＋砸地冲击波，站在平台边缘躲开再输出。",
+      "startGun": true,
+      "bosses": [
+        {
+          "kind": "guy",
+          "hp": 72
+        }
+      ],
+      "grid": [
+        "################################################",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#.....######........................######.....#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...............######........######...........#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#.....######........................######.....#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#.S.....................B......................#",
+        "################################################"
+      ],
+      "index": 16,
+      "builtin": true
+    },
+    {
+      "id": "b2",
+      "name": "MECHA KID",
+      "type": "boss",
+      "diff": 4,
+      "bg": "boss",
+      "width": 48,
+      "hint": "冲刺时贴地必死。跳上高台躲，等他停下再打。",
+      "startGun": true,
+      "bosses": [
+        {
+          "kind": "mecha",
+          "hp": 96
+        }
+      ],
+      "grid": [
+        "################################################",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#............######..........######............#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...######............................######...#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...............######........######...........#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...######............................######...#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#.S.....................B......................#",
+        "################################################"
+      ],
+      "index": 17,
+      "builtin": true
+    },
+    {
+      "id": "b3",
+      "name": "THE DEVIL",
+      "type": "boss",
+      "diff": 5,
+      "bg": "boss",
+      "width": 48,
+      "hint": "三阶段：追踪弹 → 激光横扫 → 环形弹幕。地上还有刺。活下来。",
+      "startGun": true,
+      "bosses": [
+        {
+          "kind": "devil",
+          "hp": 128
+        }
+      ],
+      "grid": [
+        "################################################",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#.....######........................######.....#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...............######........######...........#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...######............................######...#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#...............######........######...........#",
+        "#..............................................#",
+        "#..............................................#",
+        "#..............................................#",
+        "#.S.........^^..........B.........^^...........#",
+        "################################################"
+      ],
+      "index": 18,
+      "builtin": true
+    },
+    {
+      "id": "r1",
+      "name": "TRUST NO ONE",
+      "type": "troll",
+      "diff": 3,
+      "bg": "troll",
+      "width": 56,
+      "hint": "路牌在骗你。那两颗\"补给\"也不怀好意。地板会塌。",
+      "messages": [
+        "← 地板很结实，放心走 →",
+        "这颗苹果看起来很好吃"
+      ],
+      "grid": [
+        "########################################################",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#...................D.................D................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#.S..T...*............G.............*...........T...X..#",
+        "###########VVVVVVVV########^^^^^#########VVVVVV#########"
+      ],
+      "index": 19,
+      "builtin": true
+    },
+    {
+      "id": "r2",
+      "name": "FALSE GOAL",
+      "type": "troll",
+      "diff": 4,
+      "bg": "troll",
+      "width": 56,
+      "hint": "地上那扇门是假的——走过去就死。真正的终点在右上角。",
+      "messages": [
+        "终点就在前面！→",
+        "真的在上面。"
+      ],
+      "grid": [
+        "########################################################",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#.................................................X....#",
+        "#...............................................#####..#",
+        "#......................................................#",
+        "#...........................................#####......#",
+        "#......................................................#",
+        "#.....................................#####............#",
+        "#......................................................#",
+        "#...........................................#####......#",
+        "#......................................................#",
+        "#.....................................#####............#",
+        "#.S.....T......G........^^....X.....G..................#",
+        "########################################################"
+      ],
+      "events": [
+        {
+          "x": 28,
+          "y": 14,
+          "w": 6,
+          "h": 5,
+          "once": false,
+          "actions": [
+            {
+              "type": "kill"
+            }
+          ]
+        }
+      ],
+      "index": 20,
+      "builtin": true
+    },
+    {
+      "id": "r3",
+      "name": "BLIND",
+      "type": "troll",
+      "diff": 4,
+      "bg": "troll",
+      "width": 56,
+      "hint": "摄像头接管了视野：你只能看见身边一小块地方。天上下刺也看不见。",
+      "messages": [
+        "摄像头已启动 ★"
+      ],
+      "grid": [
+        "########################################################",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#......................................................#",
+        "#.................D...........D.............D..........#",
+        "#......................................................#",
+        "#......................................................#",
+        "#.S...T........G................G............X.........#",
+        "#########^^^##########^^^^############^^^#########^^^^##"
+      ],
+      "camzones": [
+        {
+          "x": 1,
+          "y": 14,
+          "w": 54,
+          "h": 5,
+          "mode": "zoom",
+          "zoom": 2.6
+        }
+      ],
+      "index": 21,
+      "builtin": true
+    },
+    {
+      "id": "r4",
+      "name": "TROLL PARADISE",
+      "type": "troll",
+      "diff": 5,
+      "bg": "troll",
+      "width": 64,
+      "hint": "漩涡送你回起点，\"补给\"会杀你，地板会塌，天上还会下刺雨。",
+      "messages": [
+        "这是最后的考验（笑）",
+        "前面的门是假的"
+      ],
+      "grid": [
+        "################################################################",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#...........D............D............D................D.......#",
+        "#..............................................................#",
+        "#..............................................................#",
+        "#.S..T.*...........G..........*.............W..T..........X....#",
+        "#########VVVVVV########^^^^########VVVVVV########^^^############"
+      ],
+      "warps": [
+        {
+          "to": "spawn"
+        }
+      ],
+      "events": [
+        {
+          "x": 28,
+          "y": 14,
+          "w": 5,
+          "h": 5,
+          "once": false,
+          "actions": [
+            {
+              "type": "spikes",
+              "x": 26,
+              "y": 0,
+              "count": 8,
+              "gap": 2
+            }
+          ]
+        }
+      ],
+      "index": 22,
+      "builtin": true
+    }
+  ],
+  "typeLabel": {
+    "jump": "跳刺",
+    "endur": "耐久",
+    "boss": "BOSS",
+    "troll": "坑向",
+    "custom": "自制"
+  },
+  "typeClass": {
+    "jump": "t-jump",
+    "endur": "t-endur",
+    "boss": "t-boss",
+    "troll": "t-troll",
+    "custom": "t-custom"
+  }
+}
\ No newline at end of file
diff --git a/app/ios/.gitignore b/app/ios/.gitignore
new file mode 100644
index 0000000..7a7f987
--- /dev/null
+++ b/app/ios/.gitignore
@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3
diff --git a/app/ios/Flutter/AppFrameworkInfo.plist b/app/ios/Flutter/AppFrameworkInfo.plist
new file mode 100644
index 0000000..391a902
--- /dev/null
+++ b/app/ios/Flutter/AppFrameworkInfo.plist
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+</dict>
+</plist>
diff --git a/app/ios/Flutter/Debug.xcconfig b/app/ios/Flutter/Debug.xcconfig
new file mode 100644
index 0000000..592ceee
--- /dev/null
+++ b/app/ios/Flutter/Debug.xcconfig
@@ -0,0 +1 @@
+#include "Generated.xcconfig"
diff --git a/app/ios/Flutter/Release.xcconfig b/app/ios/Flutter/Release.xcconfig
new file mode 100644
index 0000000..592ceee
--- /dev/null
+++ b/app/ios/Flutter/Release.xcconfig
@@ -0,0 +1 @@
+#include "Generated.xcconfig"
diff --git a/app/ios/Runner.xcodeproj/project.pbxproj b/app/ios/Runner.xcodeproj/project.pbxproj
new file mode 100644
index 0000000..f6f919e
--- /dev/null
+++ b/app/ios/Runner.xcodeproj/project.pbxproj
@@ -0,0 +1,644 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		331C808B294A63AB00263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C807B294A618700263BE5 /* RunnerTests.swift */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		7884E8682EC3CC0700C636F2 /* SceneDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7884E8672EC3CC0400C636F2 /* SceneDelegate.swift */; };
+		78A318202AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage in Frameworks */ = {isa = PBXBuildFile; productRef = 78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
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+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				MTL_ENABLE_DEBUG_INFO = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		97C147041CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = NO;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		97C147061CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.iwbtc.iwbtc;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
+		97C147071CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.iwbtc.iwbtc;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				331C8088294A63A400263BE5 /* Debug */,
+				331C8089294A63A400263BE5 /* Release */,
+				331C808A294A63A400263BE5 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147031CF9000F007C117D /* Debug */,
+				97C147041CF9000F007C117D /* Release */,
+				249021D3217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+
+/* Begin XCLocalSwiftPackageReference section */
+		781AD8BC2B33823900A9FFBB /* XCLocalSwiftPackageReference "Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage" */ = {
+			isa = XCLocalSwiftPackageReference;
+			relativePath = Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage;
+		};
+/* End XCLocalSwiftPackageReference section */
+
+/* Begin XCSwiftPackageProductDependency section */
+		78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = FlutterGeneratedPluginSwiftPackage;
+		};
+/* End XCSwiftPackageProductDependency section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}
diff --git a/app/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/app/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/app/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/app/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/app/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/app/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/app/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings b/app/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
new file mode 100644
index 0000000..f9b0d7c
--- /dev/null
+++ b/app/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>
diff --git a/app/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/app/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
new file mode 100644
index 0000000..c3fedb2
--- /dev/null
+++ b/app/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -0,0 +1,119 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1510"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <PreActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "Run Prepare Flutter Framework Script"
+               scriptText = "/bin/sh &quot;$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh&quot; prepare&#10;">
+               <EnvironmentBuildable>
+                  <BuildableReference
+                     BuildableIdentifier = "primary"
+                     BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+                     BuildableName = "Runner.app"
+                     BlueprintName = "Runner"
+                     ReferencedContainer = "container:Runner.xcodeproj">
+                  </BuildableReference>
+               </EnvironmentBuildable>
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C8080294A63A400263BE5"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      enableGPUValidationMode = "1"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/app/ios/Runner.xcworkspace/contents.xcworkspacedata b/app/ios/Runner.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..1d526a1
--- /dev/null
+++ b/app/ios/Runner.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>
diff --git a/app/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/app/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/app/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/app/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings b/app/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
new file mode 100644
index 0000000..f9b0d7c
--- /dev/null
+++ b/app/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>
diff --git a/app/ios/Runner/AppDelegate.swift b/app/ios/Runner/AppDelegate.swift
new file mode 100644
index 0000000..c30b367
--- /dev/null
+++ b/app/ios/Runner/AppDelegate.swift
@@ -0,0 +1,16 @@
+import Flutter
+import UIKit
+
+@main
+@objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+
+  func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {
+    GeneratedPluginRegistrant.register(with: engineBridge.pluginRegistry)
+  }
+}
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
new file mode 100644
index 0000000..d36b1fa
--- /dev/null
+++ b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
new file mode 100644
index 0000000..dc9ada4
Binary files /dev/null and b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png differ
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
new file mode 100644
index 0000000..7353c41
Binary files /dev/null and b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png differ
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
new file mode 100644
index 0000000..797d452
Binary files /dev/null and b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png differ
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
new file mode 100644
index 0000000..6ed2d93
Binary files /dev/null and b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png differ
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
new file mode 100644
index 0000000..4cd7b00
Binary files /dev/null and b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png differ
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
new file mode 100644
index 0000000..fe73094
Binary files /dev/null and b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png differ
diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
new file mode 100644
index 0000000..321773c
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diff --git a/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png b/app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
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diff --git a/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
new file mode 100644
index 0000000..0bedcf2
--- /dev/null
+++ b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
diff --git a/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
new file mode 100644
index 0000000..9da19ea
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diff --git a/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
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index 0000000..9da19ea
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diff --git a/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
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diff --git a/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
new file mode 100644
index 0000000..89c2725
--- /dev/null
+++ b/app/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.
\ No newline at end of file
diff --git a/app/ios/Runner/Base.lproj/LaunchScreen.storyboard b/app/ios/Runner/Base.lproj/LaunchScreen.storyboard
new file mode 100644
index 0000000..f2e259c
--- /dev/null
+++ b/app/ios/Runner/Base.lproj/LaunchScreen.storyboard
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>
diff --git a/app/ios/Runner/Base.lproj/Main.storyboard b/app/ios/Runner/Base.lproj/Main.storyboard
new file mode 100644
index 0000000..f3c2851
--- /dev/null
+++ b/app/ios/Runner/Base.lproj/Main.storyboard
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>
diff --git a/app/ios/Runner/Info.plist b/app/ios/Runner/Info.plist
new file mode 100644
index 0000000..0334c69
--- /dev/null
+++ b/app/ios/Runner/Info.plist
@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Iwbtc</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>iwbtc</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneClassName</key>
+					<string>UIWindowScene</string>
+					<key>UISceneConfigurationName</key>
+					<string>flutter</string>
+					<key>UISceneDelegateClassName</key>
+					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
+					<key>UISceneStoryboardFile</key>
+					<string>Main</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>
diff --git a/app/ios/Runner/Runner-Bridging-Header.h b/app/ios/Runner/Runner-Bridging-Header.h
new file mode 100644
index 0000000..308a2a5
--- /dev/null
+++ b/app/ios/Runner/Runner-Bridging-Header.h
@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"
diff --git a/app/ios/Runner/SceneDelegate.swift b/app/ios/Runner/SceneDelegate.swift
new file mode 100644
index 0000000..b9ce8ea
--- /dev/null
+++ b/app/ios/Runner/SceneDelegate.swift
@@ -0,0 +1,6 @@
+import Flutter
+import UIKit
+
+class SceneDelegate: FlutterSceneDelegate {
+
+}
diff --git a/app/ios/RunnerTests/RunnerTests.swift b/app/ios/RunnerTests/RunnerTests.swift
new file mode 100644
index 0000000..86a7c3b
--- /dev/null
+++ b/app/ios/RunnerTests/RunnerTests.swift
@@ -0,0 +1,12 @@
+import Flutter
+import UIKit
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}
diff --git a/app/lib/main.dart b/app/lib/main.dart
new file mode 100644
index 0000000..89df29c
--- /dev/null
+++ b/app/lib/main.dart
@@ -0,0 +1,57 @@
+// 入口：安装全局错误钩子后用标准 runApp 启动。
+// 关键点：release 包里框架/build 抛出的异常不会被自动展示，只会留黑屏；
+// 这里统一接管 FlutterError.onError、Zone 未捕获异常与 ErrorWidget.builder。
+// ensureInitialized 与 runApp 都放进同一个 zone，避免触发 debugCheckZone 的
+// "Zone mismatch"。runApp 内部会做 wrapWithDefaultView，注入 View 祖先。
+import 'dart:async' show runZonedGuarded;
+import 'package:flutter/foundation.dart'
+    show FlutterErrorDetails, defaultTargetPlatform, TargetPlatform;
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart'
+    show DeviceOrientation, SystemChrome;
+import 'package:iwbtc/src/core/app_error.dart';
+import 'package:iwbtc/src/app_root.dart' show AppRoot;
+
+Future<void> main() async {
+  runZonedGuarded(
+    () async {
+      WidgetsFlutterBinding.ensureInitialized();
+
+      // 框架级错误（build / layout / paint / 手势回调等）。
+      FlutterError.onError = (FlutterErrorDetails d) {
+        FlutterError.presentError(d); // 保持控制台/日志里的完整输出
+        AppError.reportFlutter(d);
+      };
+
+      // Widget 抛错时的占位界面 —— 换成可读文案，而不是默认的红屏/黑屏。
+      ErrorWidget.builder = (FlutterErrorDetails d) =>
+          AppError.buildScreen(d.exceptionAsString());
+
+      await _configureMobile();
+      runApp(const AppRoot());
+    },
+    (Object e, StackTrace st) {
+      AppError.reportZone(e, st);
+    },
+  );
+}
+
+/// 移动端专属的显示适配：锁定横屏。
+///
+/// 画面是 800×608 的横向虚拟舞台，横屏下信箱缩放才能拿到可用的可视比例；
+/// 竖屏时上下留白巨大、画面极小，虚拟手柄也会挤成一团。桌面端保持原样不干预。
+/// （安卓另有 AndroidManifest 的 `screenOrientation="sensorLandscape"`，
+///   保证冷启动第一帧就是横屏，避免先竖后横的闪烁。）
+Future<void> _configureMobile() async {
+  final t = defaultTargetPlatform;
+  if (t != TargetPlatform.android && t != TargetPlatform.iOS) return;
+  try {
+    await SystemChrome.setPreferredOrientations(<DeviceOrientation>[
+      DeviceOrientation.landscapeLeft,
+      DeviceOrientation.landscapeRight,
+    ]);
+  } catch (e) {
+    // 某些设备/系统策略不允许锁定方向，属可容忍情况，不影响游戏运行。
+    AppError.warn('锁定横屏失败（保持系统默认方向）', '$e');
+  }
+}
diff --git a/app/lib/src/app_root.dart b/app/lib/src/app_root.dart
new file mode 100644
index 0000000..8673c0f
--- /dev/null
+++ b/app/lib/src/app_root.dart
@@ -0,0 +1,319 @@
+// 应用根：实现 GameHost，拥有 World，驱动 Ticker 循环，处理键盘，组装界面栈。
+import 'dart:ui' show Color;
+import 'dart:async' show Timer;
+import 'package:flutter/material.dart';
+import 'package:flutter/foundation.dart'
+    show debugPrint, defaultTargetPlatform, TargetPlatform;
+import 'package:flutter/scheduler.dart' show Ticker;
+import 'package:flutter/services.dart'
+    show RawKeyboard, RawKeyEvent, RawKeyDownEvent;
+import 'package:iwbtc/src/core/app_error.dart' show AppError;
+import 'package:iwbtc/src/core/save.dart';
+import 'package:iwbtc/src/core/input.dart' show Input;
+import 'package:iwbtc/src/game/levels.dart' show LEVELS, loadLevels;
+import 'package:iwbtc/src/game/world.dart' show World, GameHost;
+import 'package:iwbtc/src/audio/sfx.dart' show Sfx;
+import 'package:iwbtc/src/ui/game_canvas.dart' show GameCanvas;
+import 'package:iwbtc/src/ui/overlays.dart' show HudOverlay;
+import 'package:iwbtc/src/ui/screens.dart'
+    show TitleScreen, LevelSelectScreen, PauseScreen, ResultScreen, SettingsScreen;
+import 'package:iwbtc/src/ui/touch_controls.dart' show TouchControls;
+import 'package:iwbtc/src/ui/editor_panel.dart' show EditorPanel, EditorController;
+
+class AppRoot extends StatefulWidget {
+  const AppRoot({super.key});
+  @override
+  State<AppRoot> createState() => _AppRootState();
+}
+
+class _AppRootState extends State<AppRoot>
+    with SingleTickerProviderStateMixin
+    implements GameHost {
+  late World world;
+  late EditorController editor;
+  bool _ready = false;
+  bool _worldOk = false;
+  bool _useTouch = false;
+  bool _audioUnlocked = false;
+
+  final ValueNotifier<String> screen = ValueNotifier<String>('scr-title');
+  final ValueNotifier<Map<String, dynamic>> hud =
+      ValueNotifier<Map<String, dynamic>>(<String, dynamic>{});
+  final ValueNotifier<dynamic> boss = ValueNotifier<dynamic>(null);
+  final ValueNotifier<String> toast = ValueNotifier<String>('');
+  final ValueNotifier<Map<String, dynamic>> result =
+      ValueNotifier<Map<String, dynamic>>(<String, dynamic>{});
+  final ValueNotifier<bool> touchVisible = ValueNotifier<bool>(false);
+  final ValueNotifier<bool> touchGun = ValueNotifier<bool>(false);
+  final ValueNotifier<String> pauseQuit = ValueNotifier<String>('返回关卡选择');
+  final ValueNotifier<int> levelsReload = ValueNotifier<int>(0);
+  final ValueNotifier<int> frame = ValueNotifier<int>(0);
+
+  late Ticker _ticker;
+  int _lastMs = 0;
+  Timer? _watchdog;
+  bool _loggedTick = false;
+  bool _loggedBuild = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _useTouch = defaultTargetPlatform == TargetPlatform.android;
+    // 看门狗：初始化迟迟不完成时报出可诊断信息，避免永远停在加载态。
+    _watchdog = Timer(const Duration(seconds: 12), () {
+      if (mounted && !_ready) {
+        AppError.report(
+          '初始化超时（12 秒未完成）',
+          'ready=$_ready worldOk=$_worldOk\n'
+              '请用 adb logcat 查看 DEBUG 输出中的 [AppError] / [AppWarn] 行。',
+        );
+      }
+    });
+    _init();
+  }
+
+  /// 分阶段初始化：任何一环失败都记录错误并尽力继续，
+  /// 避免一处异常导致 _ready 永远为 false —— 那正是"永久黑屏"的成因。
+  Future<void> _init() async {
+    debugPrint('[boot] init start');
+    // 1) 存档读取失败：退化为内存存档，游戏仍可玩（仅记日志）。
+    try {
+      await Save.load();
+      debugPrint('[boot] save loaded ok');
+    } catch (e, s) {
+      AppError.warn('存档读取失败（已退化为内存存档）', '$e\n$s');
+    }
+    // 2) 内置关卡加载失败：退化为空清单，不影响标题与其他界面（仅记日志）。
+    try {
+      await loadLevels();
+      debugPrint('[boot] levels loaded: ${LEVELS.length}');
+    } catch (e, s) {
+      AppError.warn('内置关卡加载失败（levels.json 未能读取）', '$e\n$s');
+    }
+    // 3) 世界与输入装配：失败则无法继续，交给错误界面展示。
+    try {
+      Sfx.enabled = Save.data['audio'] != false;
+      world = World(this);
+      world.useTouch = _useTouch;
+      editor = EditorController();
+      editor.runner = world;
+      RawKeyboard.instance.addListener(_rawKey);
+      _ticker = createTicker(_onTick);
+      _ticker.start();
+      _worldOk = true;
+      debugPrint('[boot] world assembled');
+    } catch (e, s) {
+      AppError.report('游戏初始化失败', '$e\n$s');
+    }
+    if (mounted) setState(() => _ready = true);
+    debugPrint('[boot] init done: ready=$_ready worldOk=$_worldOk');
+  }
+
+  void _onTick(Duration elapsed) {
+    if (!_loggedTick) {
+      _loggedTick = true;
+      debugPrint('[boot] first tick fired (game loop running)');
+    }
+    final dt = elapsed.inMilliseconds - _lastMs;
+    _lastMs = elapsed.inMilliseconds;
+    world.tick(dt);
+    frame.value++;
+  }
+
+  void _rawKey(RawKeyEvent e) {
+    if (world.state != 'playing' && world.state != 'paused') return;
+    if (!_audioUnlocked) {
+      _audioUnlocked = true;
+      Sfx.instance.unlock();
+    }
+    final code = e.logicalKey.debugName?.replaceAll(' ', '') ?? '';
+    Input.onKey(code, e is RawKeyDownEvent);
+  }
+
+  @override
+  void dispose() {
+    _watchdog?.cancel();
+    RawKeyboard.instance.removeListener(_rawKey);
+    _ticker.dispose();
+    super.dispose();
+  }
+
+  // ---------------- GameHost ----------------
+  @override
+  void onShowScreen(String name) {
+    screen.value = name;
+    if (name == 'scr-editor' ||
+        name == 'scr-title' ||
+        name == 'scr-levels' ||
+        name == 'scr-settings') {
+      touchVisible.value = false;
+    }
+  }
+
+  @override
+  void onHud(Map<String, dynamic> h) => hud.value = h;
+
+  @override
+  void onBossBar(dynamic b) => boss.value = b;
+
+  @override
+  void onToast(String t) => toast.value = t;
+
+  @override
+  void onResult(Map<String, dynamic> r) => result.value = r;
+
+  @override
+  void onPauseMenu(String label) => pauseQuit.value = label;
+
+  @override
+  void editorShow() => editor.showOrOpen();
+
+  @override
+  void touchShow() => touchVisible.value = true;
+
+  @override
+  void touchHide() {
+    touchVisible.value = false;
+    Input.clearTouch();
+  }
+
+  @override
+  void touchSetGun(bool has) => touchGun.value = has;
+
+  @override
+  Widget build(BuildContext context) {
+    return ValueListenableBuilder<String?>(
+      valueListenable: AppError.current,
+      builder: (_, String? err, __) {
+        // 致命错误优先展示详情 —— release 包里原本只会留下一片黑屏。
+        if (err != null) {
+          return MaterialApp(home: Scaffold(body: AppError.buildScreen(err)));
+        }
+        // 尚未就绪：显示可见的加载界面（不再是纯黑背景）。
+        if (!_ready || !_worldOk) return const MaterialApp(home: _BootScreen());
+        return _buildGame();
+      },
+    );
+  }
+
+  /// 真正的游戏界面栈（画布 + 各屏幕 + HUD + 触屏手柄）。
+  Widget _buildGame() {
+    if (!_loggedBuild) {
+      _loggedBuild = true;
+      debugPrint(
+          '[boot] buildGame: state=${world.state} screen=${screen.value}');
+    }
+    return MaterialApp(
+      home: Scaffold(
+        backgroundColor: const Color(0xff000000),
+        body: Stack(
+          children: <Widget>[
+            Positioned.fill(
+              child: GameCanvas(world: world, repaint: frame),
+            ),
+            // 注意：Positioned 必须是 Stack 的直接子级。此前把 Positioned 放在
+            // ValueListenableBuilder 的返回值里（隔着一层），定位数据被丢弃，
+            // 导致整棵标题树横向塌缩为 0 宽 —— 界面上只剩近黑的画布，即"黑屏"。
+            Positioned.fill(
+              child: ValueListenableBuilder<String>(
+                valueListenable: screen,
+                builder: (_, String s, __) {
+                  if (s == 'scr-title') {
+                    return TitleScreen(
+                      world: world,
+                      onSettings: () => screen.value = 'scr-settings',
+                      onEditor: () => world.toEditor(),
+                    );
+                  }
+                  if (s == 'scr-levels') {
+                    return LevelSelectScreen(
+                      world: world,
+                      reload: levelsReload,
+                      onChanged: () => levelsReload.value++,
+                    );
+                  }
+                  if (s == 'scr-settings') {
+                    return SettingsScreen(
+                      world: world,
+                      isTouch: _useTouch,
+                      onBack: () => world.toTitle(),
+                    );
+                  }
+                  if (s == 'scr-editor') {
+                    return EditorPanel(
+                      controller: editor,
+                      onBack: () => world.toTitle(),
+                    );
+                  }
+                  return const SizedBox();
+                },
+              ),
+            ),
+            // 暂停 / 结算（半透明，覆盖在画布之上）
+            Positioned.fill(
+              child: ValueListenableBuilder<String>(
+                valueListenable: screen,
+                builder: (_, String s, __) {
+                  if (s == 'scr-pause') {
+                    return PauseScreen(world: world, quitLabel: pauseQuit.value);
+                  }
+                  if (s == 'scr-result') {
+                    return ResultScreen(world: world, result: result.value);
+                  }
+                  return const SizedBox();
+                },
+              ),
+            ),
+            // HUD：显隐必须随 world.state 变化而重建。
+            // 早先把它写成 build() 里读 world.state 的 if 分支 —— 但 startLevel()
+            // 只改 World 字段、不会触发 AppRoot 重建，于是进关卡后 HUD 永远不显示。
+            // 这里改为监听 stateN。（Positioned 仍保持 Stack 直接子级，监听在内。）
+            Positioned.fill(
+              child: ValueListenableBuilder<String>(
+                valueListenable: world.stateN,
+                builder: (_, String s, __) =>
+                    (s == 'playing' || s == 'paused')
+                        ? HudOverlay(hud: hud, boss: boss, toast: toast)
+                        : const SizedBox(),
+              ),
+            ),
+            if (_useTouch)
+              Positioned.fill(
+                child: TouchControls(
+                  world: world,
+                  visible: touchVisible,
+                  hasGun: touchGun,
+                ),
+              ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+/// 启动加载界面。取代原先近黑的空 Scaffold，
+/// 这样即使初始化较慢或出错，用户也能看到明确反馈而不是"黑屏"。
+class _BootScreen extends StatelessWidget {
+  const _BootScreen();
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: const Color(0xff08080f),
+      body: Center(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: const <Widget>[
+            CircularProgressIndicator(color: Color(0xffff5c7a)),
+            SizedBox(height: 18),
+            Text(
+              '正在加载关卡…',
+              style: TextStyle(color: Color(0xffc8c8d8), fontSize: 14),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
diff --git a/app/lib/src/audio/sfx.dart b/app/lib/src/audio/sfx.dart
new file mode 100644
index 0000000..1b2926a
--- /dev/null
+++ b/app/lib/src/audio/sfx.dart
@@ -0,0 +1,278 @@
+// 纯合成音效（对应 web 版 audio.js 的 WebAudio 合成），无外部资源。
+// 在 Dart 侧生成 16-bit PCM WAV 字节，通过 audioplayers 播放（自带播放池以支持重叠）。
+import 'dart:math';
+import 'dart:typed_data';
+import 'package:audioplayers/audioplayers.dart';
+
+class _Voice {
+  final Float32List samples; // 已含包络、相对自身 0 起点
+  final int delaySamples;
+  _Voice(this.samples, this.delaySamples);
+}
+
+class Sfx {
+  static final Sfx instance = Sfx._();
+  factory Sfx() => instance;
+  Sfx._();
+
+  static bool enabled = true;
+  static double volume = 0.5;
+
+  /// 音频不可用时永久静默。
+  ///
+  /// 音效纯属装饰，但 audioplayers 的异常会在**别的 Zone 上下文**里冒出来，
+  /// 现有的 try/catch 抓不到；一旦冒泡到全局错误钩子，整个界面会被切换成错误详情。
+  /// 因此只要音频子系统出过一次错，就彻底关掉，保证「音频坏掉 ≠ 游戏坏掉」。
+  static bool broken = false;
+
+  final int rate = 44100;
+  final List<AudioPlayer> _pool = [];
+  final Map<String, Uint8List> _cache = {};
+  bool _init = false;
+
+  void init() {
+    if (_init || broken) return;
+    _init = true;
+    try {
+      for (int i = 0; i < 12; i++) {
+        final p = AudioPlayer();
+        p.setVolume(volume);
+        _pool.add(p);
+      }
+    } catch (_) {
+      broken = true;
+    }
+  }
+
+  void setVolume(double v) {
+    volume = v;
+    for (final p in _pool) p.setVolume(v);
+  }
+
+  /// 首次用户手势时解锁音频（移动端要求用户手势后才能播放）。
+  /// 音效被关闭时不创建播放器，省资源也避免插件噪声。
+  void unlock() {
+    if (!enabled || broken) return;
+    init();
+  }
+
+  Uint8List _render(List<_Voice> voices) {
+    int maxLen = 0;
+    for (final v in voices) {
+      maxLen = max(maxLen, v.delaySamples + v.samples.length);
+    }
+    final mix = Float32List(maxLen);
+    for (final v in voices) {
+      for (int i = 0; i < v.samples.length; i++) {
+        mix[v.delaySamples + i] += v.samples[i];
+      }
+    }
+    // 限幅
+    for (int i = 0; i < mix.length; i++) {
+      if (mix[i] > 1) mix[i] = 1;
+      if (mix[i] < -1) mix[i] = -1;
+    }
+    return _encodeWav(mix);
+  }
+
+  Float32List _genTone({required double f, double f2 = 0, required double d, String type = 'square', double vol = 0.25, double delay = 0, double decay = 0}) {
+    final total = d + decay + 0.02;
+    final n = (total * rate).ceil();
+    final out = Float32List(n);
+    final t0 = (delay * rate).round();
+    final len = (d * rate).round();
+    final end = ((d + decay) * rate).round();
+    final k = decay > 0 ? -log(0.0001) / max(1e-4, (d + decay - 0.008)) : 0.0;
+    double phase = 0;
+    for (int i = 0; i < n; i++) {
+      final t = i / rate;
+      final fr = f2 > 0 ? f * pow(f2 / f, t / max(1e-6, d)) : f;
+      phase += 2 * pi * fr / rate;
+      if (phase > 1e9) phase = phase % (2 * pi);
+      double e;
+      if (t < 0.008) {
+        e = t / 0.008;
+      } else {
+        e = exp(-k * (t - 0.008));
+      }
+      final w = _wave(type, phase);
+      out[i] = w * vol * e;
+    }
+    return out;
+  }
+
+  Float32List _genNoise({required double d, double vol = 0.25, double delay = 0, double hp = 400}) {
+    final total = d + 0.02;
+    final n = (total * rate).ceil();
+    final out = Float32List(n);
+    final t0 = (delay * rate).round();
+    final end = (d * rate).round();
+    final a = hp / (hp + rate);
+    double hpState = 0, prevX = 0, prevOut = 0;
+    for (int i = 0; i < n; i++) {
+      final t = i / rate;
+      final x = (Random().nextDouble() * 2 - 1) * (1 - i / max(1, n));
+      final e = (i < end) ? 1.0 : 0.0;
+      hpState = 0.99 * hpState + x - prevX;
+      prevX = x;
+      prevOut = a * (prevOut + hpState);
+      out[i] = prevOut * vol * e;
+    }
+    return out;
+  }
+
+  static double _wave(String type, double phase) {
+    switch (type) {
+      case 'sine':
+        return sin(phase);
+      case 'triangle':
+        final f = (phase / (2 * pi)) % 1;
+        return 4 * (f - 0.5).abs() - 1;
+      case 'sawtooth':
+        final f = (phase / (2 * pi)) % 1;
+        return 2 * f - 1;
+      case 'square':
+      default:
+        return sin(phase) >= 0 ? 1 : -1;
+    }
+  }
+
+  Uint8List _encodeWav(Float32List samples) {
+    final n = samples.length;
+    final bytes = ByteData(44 + n * 2);
+    final bc = bytes.buffer.asUint8List();
+    // RIFF
+    bc.setRange(0, 4, [0x52, 0x49, 0x46, 0x46]); // RIFF
+    bytes.setUint32(4, 36 + n * 2, Endian.little);
+    bc.setRange(8, 12, [0x57, 0x41, 0x56, 0x45]); // WAVE
+    bc.setRange(12, 16, [0x66, 0x6d, 0x74, 0x20]); // fmt
+    bytes.setUint32(16, 16, Endian.little);
+    bytes.setUint16(20, 1, Endian.little); // PCM
+    bytes.setUint16(22, 1, Endian.little); // mono
+    bytes.setUint32(24, rate, Endian.little);
+    bytes.setUint32(28, rate * 2, Endian.little);
+    bytes.setUint16(32, 2, Endian.little);
+    bytes.setUint16(34, 16, Endian.little);
+    bc.setRange(36, 40, [0x64, 0x61, 0x74, 0x61]); // data
+    bytes.setUint32(40, n * 2, Endian.little);
+    for (int i = 0; i < n; i++) {
+      int s = (samples[i] * 32767).round().clamp(-32768, 32767);
+      bytes.setInt16(44 + i * 2, s, Endian.little);
+    }
+    return bc;
+  }
+
+  Uint8List _build(String name) {
+    late List<_Voice> voices;
+    switch (name) {
+      case 'jump':
+        voices = [_v(_genTone(f: 380, f2: 700, d: 0.09, type: 'square', vol: 0.16))];
+        break;
+      case 'djump':
+        voices = [_v(_genTone(f: 520, f2: 900, d: 0.09, type: 'square', vol: 0.14))];
+        break;
+      case 'shoot':
+        voices = [
+          _v(_genTone(f: 900, f2: 260, d: 0.07, type: 'square', vol: 0.14)),
+          _v(_genNoise(d: 0.05, vol: 0.06, hp: 2000), 0),
+        ];
+        break;
+      case 'death':
+        voices = [
+          _v(_genTone(f: 620, f2: 60, d: 0.55, type: 'sawtooth', vol: 0.26)),
+          _v(_genNoise(d: 0.35, vol: 0.16, hp: 300), (0.02 * rate).round()),
+        ];
+        break;
+      case 'save':
+        voices = [
+          _v(_genTone(f: 700, d: 0.08, type: 'triangle', vol: 0.2)),
+          _v(_genTone(f: 1050, d: 0.13, type: 'triangle', vol: 0.18), (0.07 * rate).round()),
+        ];
+        break;
+      case 'goal':
+        voices = [
+          for (int i = 0; i < 4; i++)
+            _v(_genTone(f: [523.0, 659.0, 784.0, 1047.0][i], d: 0.16, type: 'triangle', vol: 0.2), (i * 0.1 * rate).round()),
+        ];
+        break;
+      case 'warp':
+        voices = [_v(_genTone(f: 300, f2: 1400, d: 0.2, type: 'sine', vol: 0.18))];
+        break;
+      case 'hit':
+        voices = [_v(_genTone(f: 200, f2: 90, d: 0.08, type: 'square', vol: 0.16))];
+        break;
+      case 'bossHit':
+        voices = [_v(_genTone(f: 260, f2: 140, d: 0.1, type: 'sawtooth', vol: 0.14))];
+        break;
+      case 'bossDie':
+        voices = [
+          for (int i = 0; i < 5; i++)
+            _v(_genTone(f: [400.0, 330.0, 260.0, 180.0, 110.0][i], d: 0.22, type: 'sawtooth', vol: 0.22), (i * 0.11 * rate).round()),
+          _v(_genNoise(d: 0.8, vol: 0.2, hp: 150), (0.1 * rate).round()),
+        ];
+        break;
+      case 'menu':
+        voices = [_v(_genTone(f: 620, d: 0.05, type: 'square', vol: 0.12))];
+        break;
+      case 'vanish':
+        voices = [_v(_genTone(f: 700, f2: 300, d: 0.12, type: 'sine', vol: 0.1))];
+        break;
+      case 'troll':
+        voices = [_v(_genTone(f: 180, f2: 900, d: 0.3, type: 'sine', vol: 0.18))];
+        break;
+      case 'splash':
+        voices = [_v(_genNoise(d: 0.18, vol: 0.12, hp: 800))];
+        break;
+      default:
+        voices = [_v(_genTone(f: 440, d: 0.05, type: 'square', vol: 0.1))];
+    }
+    return _render(voices);
+  }
+
+  _Voice _v(Float32List s, [int delaySamples = 0]) => _Voice(s, delaySamples);
+
+  void _play(String name) {
+    if (!enabled || broken) return;
+    try {
+      init();
+      final bytes = _cache.putIfAbsent(name, () => _build(name));
+      // 找一个空闲播放器
+      AudioPlayer? free;
+      for (final p in _pool) {
+        if (p.state == PlayerState.stopped || p.state == PlayerState.completed) {
+          free = p;
+          break;
+        }
+      }
+      free ??= _pool[_lastIdx = (_lastIdx + 1) % _pool.length];
+      free.stop().catchError((Object _) {
+        broken = true;
+      });
+      free
+          .play(BytesSource(bytes, mimeType: 'audio/wav'))
+          .catchError((Object _) {
+        broken = true;
+      });
+    } catch (_) {
+      // 任何失败都只静音，不影响玩法。
+      broken = true;
+    }
+  }
+
+  int _lastIdx = 0;
+
+  void jump() => _play('jump');
+  void djump() => _play('djump');
+  void shoot() => _play('shoot');
+  void death() => _play('death');
+  void save() => _play('save');
+  void goal() => _play('goal');
+  void warp() => _play('warp');
+  void hit() => _play('hit');
+  void bossHit() => _play('bossHit');
+  void bossDie() => _play('bossDie');
+  void menu() => _play('menu');
+  void vanish() => _play('vanish');
+  void troll() => _play('troll');
+  void splash() => _play('splash');
+}
diff --git a/app/lib/src/core/app_error.dart b/app/lib/src/core/app_error.dart
new file mode 100644
index 0000000..0d0b101
--- /dev/null
+++ b/app/lib/src/core/app_error.dart
@@ -0,0 +1,110 @@
+// 全局错误捕获与展示。
+// 目的：release 包里任何未捕获异常都会被静默吞掉，只留下一片黑屏。
+// 这里把所有异常统一收拢到一个 ValueNotifier，并由 AppRoot 优先渲染成
+// 可读的错误详情界面，方便在真机上直接看到堆栈（配合 adb logcat 更好）。
+import 'package:flutter/foundation.dart'
+    show debugPrint, FlutterErrorDetails, ValueNotifier;
+import 'package:flutter/widgets.dart';
+
+class AppError {
+  AppError._();
+
+  /// 首个被捕获的错误详情；非空时整个应用改为显示错误界面。
+  static final ValueNotifier<String?> current = ValueNotifier<String?>(null);
+
+  static bool get hasError => current.value != null;
+
+  static void _log(String tag, String head, String body) {
+    final trimmed = body.trim();
+    final text = trimmed.isEmpty ? head : '$head\n\n$trimmed';
+    debugPrint('[$tag] $text');
+  }
+
+  /// 记录致命错误（占屏展示；只保留第一个，避免刷屏把界面刷乱）。
+  static void report(String head, [String body = '']) {
+    _log('AppError', head, body);
+    if (current.value != null) return;
+    final trimmed = body.trim();
+    current.value = trimmed.isEmpty ? head : '$head\n\n$trimmed';
+  }
+
+  /// 记录 Flutter 框架级错误（build / layout / paint 抛出的）。
+  static void reportFlutter(FlutterErrorDetails d) {
+    report(d.exceptionAsString(), d.stack?.toString() ?? '');
+  }
+
+  /// 记录 Zone 内未捕获的异步错误。
+  static void reportZone(Object e, StackTrace st) {
+    // 音效插件的缺失/未初始化会以异步错误的形式冒出来，届时已错过 Sfx 内部的
+    // try/catch。音频只是装饰性能力，不能因为设备不支持就把整局游戏判死刑，
+    // 因此这类错误降级为日志。其余错误照常占屏，保证真机上仍看得见堆栈。
+    if (isAudioNoise(e)) {
+      warn('音频子系统不可用（已静音，游戏继续）', '$e');
+      return;
+    }
+    report(e.toString(), st.toString());
+  }
+
+  /// 是否为已知的音频插件噪声错误。
+  static bool isAudioNoise(Object e) {
+    final s = e.toString().toLowerCase();
+    return s.contains('missingpluginexception') &&
+        (s.contains('audioplayers') || s.contains('xyz.luan'));
+  }
+
+  /// 非致命问题：仅写日志（adb logcat 可查），不占用界面，游戏继续运行。
+  static void warn(String head, [String body = '']) {
+    _log('AppWarn', head, body);
+  }
+
+  /// 错误详情界面（替代黑屏）。
+  static Widget buildScreen(String text) {
+    // 显式提供 Directionality：ErrorWidget 可能在很早期替换出错 widget，
+    // 那时树里未必有 Directionality，缺失会引发二次报错盖住真正原因。
+    return Directionality(
+      textDirection: TextDirection.ltr,
+      child: Container(
+        color: const Color(0xff14060a),
+        padding: const EdgeInsets.all(24),
+        child: SingleChildScrollView(
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: <Widget>[
+              const SizedBox(height: 40),
+              const Text(
+                '启动失败 / 运行错误',
+                style: TextStyle(
+                  color: Color(0xffff8fa3),
+                  fontSize: 20,
+                  fontWeight: FontWeight.bold,
+                  decoration: TextDecoration.none,
+                ),
+              ),
+              const SizedBox(height: 6),
+              const Text(
+                '请把下面内容截图发给开发者，或用 adb logcat 抓取完整堆栈。',
+                style: TextStyle(
+                  color: Color(0xff9a9ab0),
+                  fontSize: 12,
+                  decoration: TextDecoration.none,
+                ),
+              ),
+              const SizedBox(height: 16),
+              Text(
+                text,
+                style: const TextStyle(
+                  color: Color(0xffe8e8f0),
+                  fontSize: 11,
+                  height: 1.4,
+                  fontFamily: 'monospace',
+                  decoration: TextDecoration.none,
+                ),
+              ),
+              const SizedBox(height: 40),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
diff --git a/app/lib/src/core/input.dart b/app/lib/src/core/input.dart
new file mode 100644
index 0000000..c5fd55b
--- /dev/null
+++ b/app/lib/src/core/input.dart
@@ -0,0 +1,124 @@
+// 输入：IWBT 经典键位（Shift 跳 / Z 跳 / X 射击 / R 重来）。
+// 与 web 版 input.js 1:1 对应。键码沿用 Web 的 KeyboardEvent.code 字符串，
+// 由 UI 层的键盘监听器把 Flutter 按键翻译成 code 后喂给 onKey()。
+import 'dart:convert';
+
+class Input {
+  /// 动作 -> 默认绑定的按键 code 列表。
+  static final Map<String, List<String>> bind = {
+    'left': ['ArrowLeft', 'KeyA'],
+    'right': ['ArrowRight', 'KeyD'],
+    'up': ['ArrowUp', 'KeyW'],
+    'down': ['ArrowDown', 'KeyS'],
+    'jump': ['ShiftLeft', 'ShiftRight', 'Space', 'KeyZ', 'KeyN'],
+    'shoot': ['KeyX', 'KeyJ', 'KeyC', 'KeyM'],
+    'suicide': ['KeyR'], // IWBT 标准：自杀并回到最近存档点
+    'restart': ['Backspace'], // 整关从头再来（放弃所有存档点）
+    'pause': ['Escape', 'KeyP'],
+    'menu': ['KeyQ'],
+  };
+
+  static final List<String> actions =
+      bind.keys.toList(); // ['left','right',...]
+
+  static final Map<String, List<String>> _defaultBind = {
+    for (final e in bind.entries) e.key: List<String>.from(e.value),
+  };
+
+  static final Set<String> down = {}; // 当前按住的原始 code
+  static final Map<String, bool> now = {for (final a in bind.keys) a: false};
+  static final Map<String, bool> prev = {for (final a in bind.keys) a: false};
+  static final Map<String, bool> touch = {}; // 触屏虚拟按键 action -> bool
+
+  static bool enabled = true;
+
+  static bool held(String a) => now[a] ?? false;
+  static bool hit(String a) => (now[a] ?? false) && !(prev[a] ?? false);
+  static bool released(String a) => !(now[a] ?? false) && (prev[a] ?? false);
+  static bool raw(String c) => down.contains(c);
+  static bool anyHit() {
+    for (final k in now.keys) {
+      if (now[k]! && !(prev[k] ?? false)) return true;
+    }
+    return false;
+  }
+
+  static void clear() {
+    down.clear();
+    for (final k in now.keys) now[k] = false;
+    for (final k in prev.keys) prev[k] = false;
+  }
+
+  /// 每逻辑帧末尾调用。
+  static void endFrame() {
+    for (final k in now.keys) prev[k] = now[k]!;
+  }
+
+  static void _refresh() {
+    for (final act in bind.keys) {
+      bool v = false;
+      for (final c in bind[act]!) {
+        if (down.contains(c)) {
+          v = true;
+          break;
+        }
+      }
+      if (touch[act] ?? false) v = true;
+      now[act] = enabled ? v : false;
+    }
+  }
+
+  /// 原始键盘事件（Web code 字符串）。
+  static void onKey(String code, bool isDown) {
+    if (isDown) {
+      down.add(code);
+    } else {
+      down.remove(code);
+    }
+    _refresh();
+  }
+
+  // ---------------- 触屏虚拟按键 ----------------
+  static void setTouch(String action, bool on) {
+    touch.putIfAbsent(action, () => false);
+    if (touch[action] == on) return;
+    touch[action] = on;
+    _refresh();
+  }
+
+  static void clearTouch() {
+    bool any = false;
+    for (final k in touch.keys) {
+      if (touch[k]!) {
+        touch[k] = false;
+        any = true;
+      }
+    }
+    if (any) _refresh();
+  }
+
+  // ---------------- 键位自定义（设置界面调用）----------------
+  static Map<String, List<String>> defaultBindings() =>
+      {for (final e in bind.entries) e.key: List<String>.from(e.value)};
+
+  static Map<String, List<String>> snapshotBindings() =>
+      {for (final e in bind.entries) e.key: List<String>.from(e.value)};
+
+  static void applyBindings(Map<String, List<String>>? map) {
+    if (map == null) return;
+    for (final act in map.keys) {
+      if (bind.containsKey(act)) bind[act] = List<String>.from(map[act]!);
+    }
+  }
+
+  /// 持久化用：转 JSON 字符串。
+  static String toJson() => jsonEncode(bind);
+  static void fromJson(String? s) {
+    if (s == null) return;
+    try {
+      final m = (jsonDecode(s) as Map).cast<String, dynamic>();
+      final decoded = m.map((k, v) => MapEntry(k, List<String>.from(v as List)));
+      applyBindings(decoded);
+    } catch (_) {}
+  }
+}
diff --git a/app/lib/src/core/save.dart b/app/lib/src/core/save.dart
new file mode 100644
index 0000000..4cd9871
--- /dev/null
+++ b/app/lib/src/core/save.dart
@@ -0,0 +1,112 @@
+// 本地存档：通关记录、最佳成绩、自制关卡。对应 web 版 save.js（localStorage）。
+// 跨平台使用 shared_preferences；内存中保留 data 镜像，写盘异步进行。
+import 'dart:convert';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class Save {
+  static Map<String, dynamic> data = _blank();
+  static late SharedPreferences _sp;
+  static bool _ready = false;
+
+  static Map<String, dynamic> _blank() => {
+        'cleared': <String, dynamic>{},
+        'customs': <dynamic>[],
+        'audio': true,
+        'settings': <String, dynamic>{},
+      };
+
+  /// 设置对象（用户名 / 触屏布局 / 键位）。不存在时自动创建。
+  static Map<String, dynamic> settings() {
+    if (data['settings'] is! Map) data['settings'] = <String, dynamic>{};
+    return data['settings'] as Map<String, dynamic>;
+  }
+
+  static Future<void> load() async {
+    _sp = await SharedPreferences.getInstance();
+    _ready = true;
+    final s = _sp.getString('iwbtc_fan_v1');
+    if (s != null) {
+      try {
+        final m = (jsonDecode(s) as Map).cast<String, dynamic>();
+        data = {..._blank(), ...m};
+        data['cleared'] = (data['cleared'] as Map?)?.cast<String, dynamic>() ??
+            <String, dynamic>{};
+        data['customs'] = (data['customs'] as List?)?.cast<dynamic>() ??
+            <dynamic>[];
+      } catch (_) {
+        data = _blank();
+      }
+    }
+  }
+
+  static void _flush() {
+    if (!_ready) return;
+    // 异步写盘，不阻塞游戏循环。
+    _sp.setString('iwbtc_fan_v1', jsonEncode(data));
+  }
+
+  /// 公开写盘入口（设置界面「确定」时调用）。
+  static void flush() => _flush();
+
+  static Map<String, dynamic>? get(String id) => data['cleared'][id] as Map<String, dynamic>?;
+  static bool isCleared(String id) => data['cleared'][id] != null;
+
+  /// 记录通关，返回是否刷新纪录。
+  static bool clear(String id, int deaths, int ms, int apples) {
+    final old = data['cleared'][id] as Map<String, dynamic>?;
+    final rec = {'deaths': deaths, 'time': ms, 'apples': apples, 'at': DateTime.now().millisecondsSinceEpoch};
+    bool better = false;
+    if (old == null) {
+      data['cleared'][id] = rec;
+      better = true;
+    } else {
+      final nd = min(old['deaths'] as int, deaths);
+      final nt = min(old['time'] as int, ms);
+      better = deaths < (old['deaths'] as int) || ms < (old['time'] as int);
+      data['cleared'][id] = {
+        ...old,
+        'deaths': nd,
+        'time': nt,
+        'apples': max((old['apples'] as int? ?? 0), apples),
+      };
+    }
+    _flush();
+    return better;
+  }
+
+  static void wipe() {
+    data = _blank();
+    _flush();
+  }
+
+  static List<dynamic> customs() => (data['customs'] as List?)?.cast<dynamic>() ?? <dynamic>[];
+  static void addCustom(Map<String, dynamic> lv) {
+    (data['customs'] as List).add(lv);
+    _flush();
+  }
+
+  /// 更新已保存的自制关卡（按 id 就地替换，不新增）；id 不存在则追加。
+  static void updateCustom(Map<String, dynamic> lv) {
+    final list = (data['customs'] as List).cast<dynamic>();
+    final i = list.indexWhere((l) => l['id'] == lv['id']);
+    if (i >= 0) {
+      list[i] = lv;
+    } else {
+      list.add(lv);
+    }
+    _flush();
+  }
+
+  static void removeCustom(String id) {
+    (data['customs'] as List).removeWhere((l) => l['id'] == id);
+    _flush();
+  }
+
+  static void setAudio(bool on) {
+    data['audio'] = on;
+    _flush();
+  }
+}
+
+int min(int a, int b) => a < b ? a : b;
+int max(int a, int b) => a > b ? a : b;
diff --git a/app/lib/src/core/util.dart b/app/lib/src/core/util.dart
new file mode 100644
index 0000000..2af1c47
--- /dev/null
+++ b/app/lib/src/core/util.dart
@@ -0,0 +1,69 @@
+// 通用工具：常量、数学、AABB、颜色、时间格式、确定性噪声。
+// 与 web 版 util.js 1:1 对应，保证逻辑一致。
+import 'dart:math';
+import 'dart:ui' show Color;
+
+const double TILE = 32.0;
+const double ROOM_W = 800.0;
+const double ROOM_H = 608.0;
+const int GRID_W = 25;
+const int GRID_H = 19;
+
+final Random _rng = Random();
+
+double clamp(double v, double a, double b) => v < a ? a : v > b ? b : v;
+double lerp(double a, double b, double t) => a + (b - a) * t;
+int sgn(double v) => v < 0 ? -1 : v > 0 ? 1 : 0;
+double rand(double a, double b) => a + _rng.nextDouble() * (b - a);
+int randInt(int a, int b) => (a + _rng.nextDouble() * (b - a + 1)).floor();
+T pick<T>(List<T> arr) => arr[_rng.nextInt(arr.length)];
+
+/// 轴对齐矩形（顶-左 x,y,w,h）。
+class Box {
+  final double x, y, w, h;
+  const Box(this.x, this.y, this.w, this.h);
+  double get right => x + w;
+  double get bottom => y + h;
+}
+
+bool overlap(Box a, Box b) =>
+    a.x < b.x + b.w && a.x + a.w > b.x && a.y < b.y + b.h && a.y + a.h > b.y;
+
+bool pointIn(double px, double py, Box r) =>
+    px >= r.x && px <= r.x + r.w && py >= r.y && py <= r.y + r.h;
+
+// ---------------- 颜色 ----------------
+Color hex(String s) {
+  var h = s.replaceFirst('#', '');
+  if (h.length == 3) {
+    h = h.split('').map((c) => c + c).join('');
+  }
+  final v = int.parse(h, radix: 16);
+  return Color.fromARGB(255, (v >> 16) & 255, (v >> 8) & 255, v & 255);
+}
+
+Color shade(Color c, int n) {
+  final r = (c.red + n).clamp(0, 255).toInt();
+  final g = (c.green + n).clamp(0, 255).toInt();
+  final b = (c.blue + n).clamp(0, 255).toInt();
+  return Color.fromARGB(255, r, g, b);
+}
+
+// ---------------- 时间 ----------------
+String fmtTime(int ms) {
+  final t = max(0, ms);
+  final m = (t / 60000).floor();
+  final s = ((t % 60000) / 1000).floor();
+  final c = ((t % 1000) / 10).floor();
+  final ss = s.toString().padLeft(2, '0');
+  final cc = c.toString().padLeft(2, '0');
+  return '$m:$ss.$cc';
+}
+
+// ---------------- 平滑确定性伪随机（仅装饰，不影响帧同步）----------------
+double hashNoise(int x, int y) {
+  int h = (x * 374761393 + y * 668265263).toUnsigned(32);
+  h = ((h ^ (h ~/ 8192)) * 1274126177).toUnsigned(32);
+  h = (h ^ (h ~/ 65536)).toUnsigned(32);
+  return h / 4294967295.0;
+}
diff --git a/app/lib/src/game/boss.dart b/app/lib/src/game/boss.dart
new file mode 100644
index 0000000..125a902
--- /dev/null
+++ b/app/lib/src/game/boss.dart
@@ -0,0 +1,287 @@
+// BOSS 战系统：多阶段弹幕 / 冲撞 / 刺雨。对应 web 版 boss.js。
+import 'dart:ui' show Canvas, Paint, Path, Color, Rect, Offset, PaintingStyle;
+import 'dart:math' show sin, cos, atan2, pi, min, max;
+import 'package:iwbtc/src/core/util.dart';
+import 'package:iwbtc/src/audio/sfx.dart';
+import 'package:iwbtc/src/game/level.dart' show Level, Entity, EBullet;
+import 'package:iwbtc/src/game/views.dart' show PlayerView;
+
+const Map<String, dynamic> defs = {
+  'guy': {'hp': 42, 'w': 64, 'h': 74, 'name': 'THE GUY'},
+  'mecha': {'hp': 62, 'w': 78, 'h': 62, 'name': 'MECHA KID'},
+  'devil': {'hp': 84, 'w': 74, 'h': 90, 'name': 'THE DEVIL'},
+};
+
+class Boss {
+  final Level level;
+  final String kind;
+  final String name;
+  double x, y, w, h;
+  double maxHp;
+  double hp;
+  int flash = 0;
+  bool dead = false;
+  int deathT = 0;
+  bool bodyKill = true;
+  int t = 0;
+  int phase = 1;
+  double vx = 0, vy = 0;
+  String state = 'idle';
+  int stateT = 0;
+  late double homeX, homeY;
+  double wing = 0;
+  late Map bounds;
+  void Function()? onDefeat;
+
+  Boss(this.level, Entity e)
+      : kind = e.kind,
+        name = (defs[e.kind] ?? defs['guy'])['name'],
+        x = e.x, y = e.y,
+        w = (defs[e.kind] ?? defs['guy'])['w'].toDouble(),
+        h = (defs[e.kind] ?? defs['guy'])['h'].toDouble(),
+        maxHp = (e.hp ?? (defs[e.kind] ?? defs['guy'])['hp']).toDouble(),
+        hp = (e.hp ?? (defs[e.kind] ?? defs['guy'])['hp']).toDouble() {
+    bounds = {
+      'x0': 40.0, 'x1': level.pxW - 40 - w,
+      'y0': 40.0, 'y1': level.pxH - 32 - h,
+    };
+    homeY = clamp(e.y, bounds['y0'], bounds['y1']);
+    y = homeY;
+    homeX = e.x;
+  }
+
+  Box get rect => Box(x, y, w, h);
+
+  void shoot(double x2, double y2, double vx, double vy, [String col = '#ff5c7a', bool big = false]) {
+    level.ebullets.add(EBullet(x: x2 - 4, y: y2 - 4, w: big ? 12 : 8, h: big ? 12 : 8, vx: vx, vy: vy, col: col, big: big));
+  }
+
+  void hit([int dmg = 1]) {
+    if (dead || flash > 6) return;
+    hp -= dmg;
+    flash = 10;
+    Sfx.instance.bossHit();
+    level.particles.spawn(x + w / 2, y + h / 2, 6, colors: const ['#fff', '#ffc63a'], speed: 2.6, life: 18);
+    final r = hp / maxHp;
+    phase = r > 0.6 ? 1 : r > 0.3 ? 2 : 3;
+    if (hp <= 0) die();
+  }
+
+  void die() {
+    dead = true; hp = 0; bodyKill = false;
+    Sfx.instance.bossDie();
+    level.shake = 16;
+    level.particles.burst(x + w / 2, y + h / 2,
+        n: 40, colors: const ['#ff5c7a', '#ffc63a', '#fff', '#e03050'], speed: 5, life: 60, size: 4);
+  }
+
+  void update(int dt, PlayerView player) {
+    if (dead) {
+      deathT++;
+      if (deathT % 8 == 0 && deathT < 90) {
+        level.particles.burst(x + rand(0, w), y + rand(0, h),
+            n: 6, colors: const ['#ffc63a', '#ff5c7a', '#fff'], speed: 3, life: 30, size: 3);
+        Sfx.instance.hit();
+      }
+      if (deathT == 90 && onDefeat != null) onDefeat!();
+      return;
+    }
+    t++;
+    stateT++;
+    if (flash > 0) flash--;
+
+    if (kind == 'guy') updateGuy(player);
+    else if (kind == 'mecha') updateMecha(player);
+    else updateDevil(player);
+
+    x += vx; y += vy;
+    x = clamp(x, bounds['x0'], max(bounds['x0'], bounds['x1']));
+    y = clamp(y, bounds['y0'], max(bounds['y0'], bounds['y1']));
+
+    for (final b in level.bullets) {
+      if (b.dead) continue;
+      if (overlap(Box(b.x, b.y, b.w, b.h), rect)) {
+        b.dead = true;
+        hit(1);
+      }
+    }
+  }
+
+  void updateGuy(PlayerView player) {
+    final L = level;
+    if (phase == 1) {
+      vx = sin(t / 60) * 1.5;
+      y = homeY + sin(t / 45) * 8;
+      if (t % 96 == 0) {
+        final cx = x + w / 2, cy = y + h / 2;
+        for (int i = -1; i <= 1; i++) {
+          final a = atan2(player.cy - cy, player.cx - cx) + i * 0.28;
+          shoot(cx, cy, cos(a) * 2.8, sin(a) * 2.8);
+        }
+        Sfx.instance.shoot();
+      }
+    } else {
+      final dir = sgn(player.cx - (x + w / 2));
+      if (state == 'idle') {
+        vx = dir * 1.9;
+        y = homeY + sin(t / 30) * 6;
+        if (stateT > 70) { state = 'slam'; stateT = 0; vy = 0; }
+      } else if (state == 'slam') {
+        vx *= 0.9;
+        vy = min(vy + 0.7, 11);
+        if (y + h >= bounds['y1'] + h * 0.2 || y >= homeY + 150) {
+          state = 'idle'; stateT = 0; vy = -3;
+          L.shake = 10; Sfx.instance.hit();
+          for (int i = 0; i < 4; i++) {
+            shoot(x + w / 2, y + h - 6, -2.6 - i * 0.4, -1.2 - i * 0.15, '#ffc63a');
+            shoot(x + w / 2, y + h - 6, 2.6 + i * 0.4, -1.2 - i * 0.15, '#ffc63a');
+          }
+        }
+      }
+    }
+  }
+
+  void updateMecha(PlayerView player) {
+    final L = level;
+    if (state == 'idle') {
+      vx *= 0.92;
+      y = homeY + sin(t / 40) * 5;
+      if (stateT > 100 - phase * 18) {
+        state = 'dash'; stateT = 0;
+        vx = sgn(player.cx - (x + w / 2)) * (5 + phase * 0.8);
+        Sfx.instance.shoot();
+      }
+      if (t % 150 == 0) {
+        for (int i = 0; i < 4 + phase; i++) {
+          final tx = randInt(1, L.w - 2);
+          L.entities.add(Entity('dropspike', 0, 0, 0, tx * TILE, -TILE, TILE, TILE)
+            ..falling = true
+            ..vy = 0
+            ..homeY = -TILE
+            ..temp = true);
+        }
+        L.showToast('刺雨来了！', 80);
+        Sfx.instance.troll();
+      }
+    } else if (state == 'dash') {
+      vy = 0;
+      if (x <= bounds['x0'] + 1 || x >= bounds['x1'] - 1 || stateT > 90) {
+        state = 'idle'; stateT = 0; vx = 0;
+        L.shake = 6;
+        L.particles.spawn(x + w / 2, y + h / 2, 8, colors: const ['#9ad8ff', '#fff'], speed: 3, life: 20);
+      }
+    }
+  }
+
+  void updateDevil(PlayerView player) {
+    final L = level;
+    wing += 0.16;
+    final cx = x + w / 2, cy = y + h / 2;
+    final p2 = phase;
+    if (p2 == 1) { vx = sin(t / 70) * 1.6; y = homeY + sin(t / 50) * 8; }
+    else if (p2 == 2) { vx = sin(t / 40) * 2.6; y = homeY + sin(t / 28) * 11; }
+    else { vx = sin(t / 25) * 3.4; y = homeY + sin(t / 20) * 14; }
+
+    if (p2 == 1) {
+      if (t % 60 == 0) {
+        final a = atan2(player.cy - cy, player.cx - cx);
+        for (int i = -1; i <= 1; i++) shoot(cx, cy, cos(a + i * 0.2) * 3, sin(a + i * 0.2) * 3, '#ff9a3a');
+        Sfx.instance.shoot();
+      }
+    } else if (p2 == 2) {
+      if (t % 110 == 0) { state = 'laser'; stateT = 0; }
+      if (state == 'laser' && stateT < 40 && stateT % 5 == 0) {
+        final yy = 40 + (stateT / 40) * (L.pxH - 90);
+        shoot(8, yy, 6.5, 0, '#ff4060', true);
+        shoot(L.pxW - 12, L.pxH - yy, -6.5, 0, '#ff4060', true);
+        Sfx.instance.shoot();
+      }
+      if (stateT > 44) state = 'idle';
+    } else {
+      if (t % 34 == 0) {
+        const n = 10;
+        final off = t / 200;
+        for (int i = 0; i < n; i++) {
+          final a = off + (i / n) * 2 * pi;
+          shoot(cx, cy, cos(a) * 2.6, sin(a) * 2.6, '#ff5c7a');
+        }
+        Sfx.instance.shoot();
+      }
+      if (t % 170 == 0) {
+        final a = atan2(player.cy - cy, player.cx - cx);
+        shoot(cx, cy, cos(a) * 4.4, sin(a) * 4.4, '#ffc63a', true);
+      }
+    }
+  }
+
+  // ---------------- 绘制 ----------------
+  void draw(Canvas c, int t) {
+    if (dead && deathT > 96) return;
+    final x = this.x, y = this.y, w = this.w, h = this.h;
+    final fl = flash > 0;
+    c.save();
+    if (kind == 'guy') drawGuy(c, x, y, w, h, fl, t);
+    else if (kind == 'mecha') drawMecha(c, x, y, w, h, fl, t);
+    else drawDevil(c, x, y, w, h, fl, t);
+    c.restore();
+  }
+
+  void drawGuy(Canvas c, double x, double y, double w, double h, bool fl, int t) {
+    final c1 = fl ? const Color(0xffffffff) : const Color(0xff2a1020);
+    final c2 = fl ? const Color(0xffffffff) : const Color(0xff5a1a34);
+    c.drawCircle(Offset(x + w / 2, y + h * 0.62), w * 0.42, Paint()..color = c1);
+    c.drawCircle(Offset(x + w / 2, y + h * 0.3), w * 0.36, Paint()..color = c2);
+    final horn = fl ? const Color(0xffffffff) : const Color(0xffc8305a);
+    _tri(c, x + w * 0.2, y + h * 0.16, x + w * 0.05, y - h * 0.12, x + w * 0.34, y + h * 0.06, horn);
+    _tri(c, x + w * 0.8, y + h * 0.16, x + w * 0.95, y - h * 0.12, x + w * 0.66, y + h * 0.06, horn);
+    c.drawRect(Rect.fromLTWH(x + w * 0.3, y + h * 0.28, w * 0.14, h * 0.1), Paint()..color = fl ? const Color(0xff000000) : const Color(0xffffe14a));
+    c.drawRect(Rect.fromLTWH(x + w * 0.56, y + h * 0.28, w * 0.14, h * 0.1), Paint()..color = fl ? const Color(0xff000000) : const Color(0xffffe14a));
+    c.drawRect(Rect.fromLTWH(x + w * 0.34, y + h * 0.46, w * 0.32, h * 0.06), Paint()..color = fl ? const Color(0xff000000) : const Color(0xff801025));
+    if (phase >= 2) {
+      final sp = Paint()
+        ..color = fl ? const Color(0xff000000) : const Color(0xffff4060)
+        ..style = PaintingStyle.stroke
+        ..strokeWidth = 2;
+      c.drawCircle(Offset(x + w / 2, y + h / 2), w * 0.62 + sin(t / 90) * 3, sp);
+    }
+  }
+
+  void drawMecha(Canvas c, double x, double y, double w, double h, bool fl, int t) {
+    c.drawRect(Rect.fromLTWH(x + 4, y + 6, w - 8, h - 10), Paint()..color = fl ? const Color(0xffffffff) : const Color(0xff3a4258));
+    c.drawRect(Rect.fromLTWH(x + 8, y + 10, w - 16, h - 20), Paint()..color = fl ? const Color(0xffffffff) : const Color(0xff68728e));
+    final blink = (t ~/ 200) % 5 == 0;
+    c.drawRect(Rect.fromLTWH(x + w * 0.22, y + h * 0.34, w * 0.18, h * 0.14), Paint()..color = fl ? const Color(0xff000000) : (state == 'dash' ? const Color(0xffff4060) : const Color(0xff7ae0ff)));
+    c.drawRect(Rect.fromLTWH(x + w * 0.6, y + h * 0.34, w * 0.18, h * 0.14), Paint()..color = fl ? const Color(0xff000000) : (state == 'dash' ? const Color(0xffff4060) : const Color(0xff7ae0ff)));
+    c.drawRect(Rect.fromLTWH(x + w * 0.42, y + h - 8, w * 0.16, 10), Paint()..color = fl ? const Color(0xffffffff) : const Color(0xff2a2f40));
+    c.drawRect(Rect.fromLTWH(x + w / 2 - 1, y - 6, 2, 8), Paint()..color = fl ? const Color(0xffffffff) : const Color(0xff8a94ad));
+    c.drawCircle(Offset(x + w / 2, y - 8), 3, Paint()..color = (t ~/ 120) % 2 == 0 ? const Color(0xffff4060) : const Color(0xff601020));
+    if (state == 'dash') {
+      c.drawRect(Rect.fromLTWH(x - 6, y + h * 0.4, 8, h * 0.2), Paint()..color = const Color(0xffffb040));
+      c.drawRect(Rect.fromLTWH(x + w - 2, y + h * 0.4, 8, h * 0.2), Paint()..color = const Color(0xffffb040));
+    }
+  }
+
+  void drawDevil(Canvas c, double x, double y, double w, double h, bool fl, int t) {
+    final fl2 = sin(this.wing) * 8;
+    final wingCol = fl ? const Color(0xffffffff) : const Color(0xff4a0f22);
+    _tri(c, x + 6, y + h * 0.4, x - 26, y + h * 0.1 + fl2, x - 4, y + h * 0.72 + fl2, wingCol);
+    _tri(c, x + w - 6, y + h * 0.4, x + w + 26, y + h * 0.1 + fl2, x + w + 4, y + h * 0.72 + fl2, wingCol);
+    c.drawCircle(Offset(x + w / 2, y + h * 0.6), w * 0.4, Paint()..color = fl ? const Color(0xffffffff) : const Color(0xff8e1030));
+    c.drawCircle(Offset(x + w / 2, y + h * 0.32), w * 0.34, Paint()..color = fl ? const Color(0xffffffff) : const Color(0xffc01a3a));
+    final horn = fl ? const Color(0xffffffff) : const Color(0xffffc63a);
+    _tri(c, x + w * 0.18, y + h * 0.14, x - w * 0.06, y - h * 0.16, x + w * 0.32, y + h * 0.04, horn);
+    _tri(c, x + w * 0.82, y + h * 0.14, x + w * 1.06, y - h * 0.16, x + w * 0.68, y + h * 0.04, horn);
+    final ec = phase == 3 ? const Color(0xff7ae0ff) : phase == 2 ? const Color(0xffffb040) : const Color(0xffffe14a);
+    c.drawRect(Rect.fromLTWH(x + w * 0.26, y + h * 0.26, w * 0.16, h * 0.12), Paint()..color = fl ? const Color(0xff000000) : ec);
+    c.drawRect(Rect.fromLTWH(x + w * 0.58, y + h * 0.26, w * 0.16, h * 0.12), Paint()..color = fl ? const Color(0xff000000) : ec);
+    for (int i = 0; i < 4; i++) c.drawRect(Rect.fromLTWH(x + w * 0.32 + i * w * 0.1, y + h * 0.46, 4, 6), Paint()..color = fl ? const Color(0xff000000) : const Color(0xffffffff));
+  }
+
+  void _tri(Canvas c, double ax, double ay, double bx, double by, double cx, double cy, Color col) {
+    final p = Path();
+    p.moveTo(ax, ay); p.lineTo(bx, by); p.lineTo(cx, cy); p.close();
+    c.drawPath(p, Paint()..color = col);
+  }
+}
+
+String bossName(String kind) => (defs[kind] ?? defs['guy'])['name'];
diff --git a/app/lib/src/game/camera.dart b/app/lib/src/game/camera.dart
new file mode 100644
index 0000000..b09718e
--- /dev/null
+++ b/app/lib/src/game/camera.dart
@@ -0,0 +1,124 @@
+// 摄像机：跟随 / 锁定 / 缩放（坑向关的"摄像头"道具靠它搞事）。
+// 与 web 版 camera.js 1:1 对应。渲染变换通过 apply()。
+import 'dart:ui' show Canvas;
+import 'dart:math' show min, max;
+import 'package:iwbtc/src/core/util.dart';
+import 'package:iwbtc/src/game/views.dart' show PlayerView;
+
+class Camera {
+  double w, h;
+  double x = 0, y = 0;
+  double zoom = 1;
+  double tz = 1;
+  String mode = 'follow';
+  double lockX = 0, lockY = 0;
+  double shakeX = 0, shakeY = 0;
+
+  Camera([this.w = 800, this.h = 608]);
+
+  void reset(LevelLike level, PlayerView player) {
+    zoom = 1;
+    tz = 1;
+    mode = 'follow';
+    snapTo(player, level);
+  }
+
+  double viewW() => w / zoom;
+  double viewH() => h / zoom;
+
+  void snapTo(PlayerView player, LevelLike level) {
+    x = clamp(player.cx - viewW() / 2, 0, max(0, level.pxW - viewW()));
+    y = clamp(player.cy - viewH() / 2, 0, max(0, level.pxH - viewH()));
+    mode = 'follow';
+    zoom = 1;
+    tz = 1;
+  }
+
+  void update(LevelLike level, PlayerView player, int dt) {
+    final zone = level.camZone;
+    double? tx, ty, tz = 1;
+    double speed = 0.16;
+
+    if (zone != null) {
+      if (zone.mode == 'lock') {
+        mode = 'lock';
+        tx = zone.lx != null ? zone.lx! : zone.x;
+        ty = zone.ly != null ? zone.ly! : zone.y;
+        tz = zone.zoom ?? 1;
+        speed = 0.05;
+      } else if (zone.mode == 'zoom') {
+        mode = 'zoom';
+        tz = zone.zoom ?? 1;
+        tx = player.cx - w / tz / 2;
+        ty = player.cy - h / tz / 2;
+        speed = 0.14;
+      } else if (zone.mode == 'off') {
+        mode = 'off';
+        tx = x;
+        ty = y;
+        tz = zone.zoom ?? zoom;
+        speed = 0;
+      }
+    } else {
+      mode = 'follow';
+      tx = player.cx - w / zoom / 2;
+      ty = player.cy - h / zoom / 2;
+      tz = 1;
+      speed = 0.16;
+    }
+
+    this.tz = lerp(this.tz, tz, 0.06);
+    if ((this.tz - zoom).abs() > 0.002) zoom = this.tz;
+
+    if (speed > 0) {
+      x = lerp(x, tx!, speed);
+      y = lerp(y, ty!, speed);
+    }
+    _clampToLevel(level);
+
+    final sh = level.shake;
+    if (sh > 0.2) {
+      shakeX = (rand(-0.5, 0.5)) * sh;
+      shakeY = (rand(-0.5, 0.5)) * sh;
+    } else {
+      shakeX = 0;
+      shakeY = 0;
+    }
+  }
+
+  void _clampToLevel(LevelLike level) {
+    final vw = viewW(), vh = viewH();
+    if (level.pxW <= vw) {
+      x = (level.pxW - vw) / 2;
+    } else {
+      x = clamp(x, 0, level.pxW - vw);
+    }
+    if (level.pxH <= vh) {
+      y = (level.pxH - vh) / 2;
+    } else {
+      y = clamp(y, 0, level.pxH - vh);
+    }
+  }
+
+  void apply(Canvas canvas) {
+    canvas.translate(shakeX, shakeY);
+    if (zoom != 1) canvas.scale(zoom, zoom);
+    canvas.translate(-x, -y);
+  }
+}
+
+/// 摄像机只关心关卡/玩家的少量字段，用抽象接口解耦避免循环依赖。
+abstract class LevelLike {
+  double get pxW;
+  double get pxH;
+  double get shake;
+  CamZoneLike? get camZone;
+}
+abstract class CamZoneLike {
+  String get mode;
+  double? get zoom;
+  double get x;
+  double get y;
+  double? get lx;
+  double? get ly;
+}
diff --git a/app/lib/src/game/level.dart b/app/lib/src/game/level.dart
new file mode 100644
index 0000000..305d277
--- /dev/null
+++ b/app/lib/src/game/level.dart
@@ -0,0 +1,785 @@
+// 关卡解析与运行时：ASCII 网格 -> tiles + 实体 + 事件。
+// 与 web 版 level.js 1:1 对应（含三角刺的 SAT 判定）。
+import 'dart:ui' show Canvas, Paint, Color, Rect, Offset;
+import 'dart:math' show min, max, sqrt;
+import 'package:flutter/widgets.dart';
+import 'package:iwbtc/src/core/util.dart';
+import 'package:iwbtc/src/game/sprites.dart';
+import 'package:iwbtc/src/game/particles.dart';
+import 'package:iwbtc/src/game/boss.dart';
+import 'package:iwbtc/src/game/camera.dart' show CamZoneLike, LevelLike, Camera;
+import 'package:iwbtc/src/game/views.dart';
+import 'package:iwbtc/src/audio/sfx.dart';
+import 'package:iwbtc/src/game/player.dart' show Player;
+
+enum Tile {
+  empty, block, grass, brick, metal, ice, water, oneway, killer, vanish,
+  spikeU, spikeD, spikeL, spikeR,
+}
+
+const Map<String, Tile> char2tile = {
+  '#': Tile.block, '@': Tile.grass, '=': Tile.brick, 'M': Tile.metal,
+  '%': Tile.ice, '~': Tile.water, '-': Tile.oneway, '*': Tile.killer, 'V': Tile.vanish,
+  '^': Tile.spikeU, 'v': Tile.spikeD, '<': Tile.spikeL, '>': Tile.spikeR,
+};
+
+const Map<String, String> char2ent = {
+  'S': 'spawn', 'G': 'save', 'X': 'goal', 'P': 'gun', 'F': 'apple', 'J': 'jumpref',
+  'W': 'warp', 'T': 'sign', 'O': 'turret', 'B': 'boss', 'D': 'dropspike',
+  'C': 'camzone', '!': 'trigger',
+};
+
+const Map<String, List<int>> esize = {
+  'spawn': [16, 26], 'save': [20, 22], 'goal': [30, 42], 'gun': [28, 24], 'apple': [18, 20],
+  'jumpref': [26, 26], 'warp': [28, 28], 'sign': [30, 26], 'turret': [32, 32],
+  'boss': [64, 64], 'dropspike': [32, 32], 'camzone': [96, 96], 'trigger': [32, 32],
+};
+
+const Set<Tile> solidTiles = {
+  Tile.block, Tile.grass, Tile.brick, Tile.metal, Tile.ice, Tile.vanish,
+};
+const Set<Tile> deadlyTiles = {
+  Tile.killer, Tile.spikeU, Tile.spikeD, Tile.spikeL, Tile.spikeR,
+};
+
+class Entity implements EntityView, CamZoneLike {
+  final String type;
+  int idx;
+  int tx, ty;
+  double x, y, w, h;
+  bool active = false;
+  bool dead = false;
+  bool taken = false;
+  int t = 0;
+  int? no;
+  bool fake = false;
+  String? text;
+  String dir = 'left';
+  int period = 90;
+  double speed = 2.4;
+  int timer = 0;
+  String kind = 'ball';
+  String? doorId;
+  int pair = 0;
+  dynamic to;
+  int cool = 0;
+  bool hidden = false;
+  String mode = 'lock';
+  double? zoom;
+  double? lx;
+  double? ly;
+  bool falling = false;
+  double vy = 0;
+  double homeY = 0;
+  bool landed = false;
+  int landT = 0;
+  bool temp = false;
+  double? hp;
+
+  Entity(this.type, this.idx, this.tx, this.ty, this.x, this.y, this.w, this.h);
+}
+
+class Mover implements MoverView {
+  double x, y, w, h;
+  List<Cell> path;
+  int i = 0;
+  int dir = 1;
+  double speed;
+  int t = 0;
+  String mode;
+  double dx = 0, dy = 0;
+  double ax, ay, aw, ah;
+  double bx, by;
+  bool gone = false;
+
+  Mover(this.x, this.y, this.w, this.h, this.path, this.speed, this.mode, this.ax, this.ay, this.aw, this.ah, this.bx, this.by);
+}
+
+class Cell {
+  final double x, y;
+  Cell(this.x, this.y);
+}
+
+class Bullet implements BulletView {
+  double x, y, w, h, vx, vy;
+  int life;
+  bool dead = false;
+  String col = '#fff6a0';
+  bool big = false;
+  Bullet({required this.x, required this.y, required this.w, required this.h, required this.vx, required this.vy, required this.life});
+}
+
+class EBullet implements BulletView {
+  double x, y, w, h, vx, vy;
+  int life;
+  bool dead = false;
+  String col;
+  bool big;
+  EBullet({required this.x, required this.y, required this.w, required this.h, required this.vx, required this.vy, this.life = 500, this.col = '#ff5c7a', this.big = false});
+}
+
+class Level implements LevelLike {
+  Map<String, dynamic> data;
+  String name;
+  String type;
+  late int w, h;
+  late double pxW, pxH;
+  late List<List<Tile>> tiles;
+  late List<Entity> entities;
+  late List<Mover> movers;
+  late List<Boss> bosses;
+  late List<dynamic> events;
+  late Particles particles;
+  late List<DeathMark> deathMarks;
+  late List<DeathFX> deathFX;
+  late Map<int, int> vanish;
+  Map<int, int>? vanishT;
+  late List<Bullet> bullets;
+  late List<EBullet> ebullets;
+  late List<dynamic> srcEntities;
+  late List<dynamic> moversSrc;
+  late List<dynamic> eventSrc;
+  late List<dynamic> msgs;
+  late List<dynamic> bossSrc;
+  late List<dynamic> warpSrc;
+  late List<dynamic> turretSrc;
+  late List<dynamic> camSrc;
+  dynamic spawnExtra;
+  String hint = '';
+  String bgTheme = 'jump';
+  int time = 0;
+  String? toast;
+  int toastT = 0;
+  double shake = 0;
+  bool beat = false;
+  CamZoneLike? camZone;
+  late Cell spawn;
+  int totalApples = 0;
+  int totalSaves = 0;
+  int? faceIndex;
+
+  Level(this.data) : name = data['name'] ?? 'STAGE', type = data['type'] ?? 'jump' {
+    parse(data);
+    particles = Particles();
+    reset(true);
+  }
+
+  // ---------------- 解析 ----------------
+  void parse(Map<String, dynamic> data) {
+    final rows = (data['grid'] as List?)?.map((e) => e as String).toList() ?? [];
+    h = rows.length;
+    w = (data['width'] as int?) ?? rows.map((r) => r.length).fold(0, max);
+    pxW = w * TILE;
+    pxH = h * TILE;
+    tiles = [];
+    final srcEnts = <Map<String, dynamic>>[];
+    final order = <String, int>{};
+
+    for (int y = 0; y < h; y++) {
+      final line = rows[y];
+      final row = <Tile>[];
+      for (int x = 0; x < w; x++) {
+        final ch = x < line.length ? line[x] : ' ';
+        if (char2tile.containsKey(ch)) {
+          row.add(char2tile[ch]!);
+        } else if (char2ent.containsKey(ch)) {
+          final type = char2ent[ch]!;
+          final ew = esize[type]![0], eh = esize[type]![1];
+          final idx = (order[type] = (order[type] ?? 0) + 1) - 1;
+          srcEnts.add({'type': type, 'idx': idx, 'tx': x, 'ty': y, 'ch': ch});
+          row.add(Tile.empty);
+        } else {
+          row.add(Tile.empty);
+        }
+      }
+      tiles.add(row);
+    }
+
+    srcEntities = srcEnts;
+    moversSrc = (data['movers'] as List?) ?? [];
+    eventSrc = (data['events'] as List?) ?? [];
+    msgs = (data['messages'] as List?) ?? [];
+    bossSrc = (data['bosses'] as List?) ?? [];
+    warpSrc = (data['warps'] as List?) ?? [];
+    turretSrc = (data['turrets'] as List?) ?? [];
+    camSrc = (data['camzones'] as List?) ?? [];
+    spawnExtra = data['spawn'];
+    hint = data['hint'] ?? '';
+    bgTheme = data['bg'] ??
+        (type == 'boss' ? 'boss' : type == 'troll' ? 'troll' : type == 'endur' ? 'endur' : 'jump');
+  }
+
+  void reset([bool full = false]) {
+    if (full) {
+      deathMarks = [];
+      deathFX = [];
+    }
+    vanish = {};
+    bullets = [];
+    ebullets = [];
+    entities = [];
+    movers = [];
+    bosses = [];
+    events = [];
+    time = 0;
+    toast = null;
+    toastT = 0;
+    particles.clear();
+    shake = 0;
+    beat = false;
+
+    int saveNo = 0;
+    for (final s in srcEntities) {
+      final type = s['type'] as String;
+      final ew = esize[type]![0], eh = esize[type]![1];
+      final idx = s['idx'] as int;
+      final tx = s['tx'] as int, ty = s['ty'] as int;
+      final e = Entity(type, idx, tx, ty,
+          tx * TILE + (TILE - ew) / 2,
+          ty * TILE + (TILE - eh),
+          ew.toDouble(), eh.toDouble());
+      e.t = 0;
+      if (type == 'goal') e.y = ty * TILE + TILE - eh;
+      if (type == 'save') { e.fake = false; e.no = ++saveNo; }
+      if (type == 'sign') e.text = (msgs.length > idx ? msgs[idx] : '...') as String?;
+      if (type == 'turret') {
+        final cfg = (idx < turretSrc.length ? turretSrc[idx] : {}) as Map? ?? {};
+        e.dir = cfg['dir'] ?? 'left';
+        e.period = cfg['period'] ?? 90;
+        e.speed = (cfg['speed'] ?? 2.4).toDouble();
+        e.timer = cfg['offset'] ?? 0;
+        e.kind = cfg['kind'] ?? 'ball';
+      }
+      if (type == 'warp') {
+        final cfg = (idx < warpSrc.length ? warpSrc[idx] : {}) as Map? ?? {};
+        final door = (data['doors'] as List?)?.cast<Map>()
+            .firstWhere((d) => d['tx'] == tx && d['ty'] == ty, orElse: () => <String, dynamic>{});
+        e.doorId = (door != null && door.isNotEmpty) ? door['id'] : idx;
+        e.pair = cfg['pair'] ?? (idx % 2 == 0 ? idx + 1 : idx - 1);
+        e.to = (door != null && door.isNotEmpty && door['to'] != null) ? door['to'] : (cfg['to']);
+        e.cool = 0;
+        e.hidden = cfg['hidden'] ?? false;
+      }
+      if (type == 'camzone') {
+        final cfg = (idx < camSrc.length ? camSrc[idx] : {}) as Map? ?? {};
+        e.w = ((cfg['w'] ?? 3) * TILE).toDouble();
+        e.h = ((cfg['h'] ?? 3) * TILE).toDouble();
+        e.x = tx * TILE;
+        e.y = ty * TILE;
+        e.mode = cfg['mode'] ?? 'lock';
+        e.zoom = cfg['zoom']?.toDouble();
+        e.lx = cfg['lx']?.toDouble();
+        e.ly = cfg['ly']?.toDouble();
+      }
+      if (type == 'dropspike') {
+        e.falling = false; e.vy = 0; e.homeY = e.y;
+      }
+      if (type == 'boss') {
+        final cfg = (idx < bossSrc.length ? bossSrc[idx] : {}) as Map? ?? {'kind': 'guy'};
+        e.kind = cfg['kind'] ?? 'guy';
+        e.hp = (cfg['hp'] ?? 40).toDouble();
+        e.w = ((cfg['w'] ?? 64)).toDouble();
+        e.h = ((cfg['h'] ?? 64)).toDouble();
+        e.x = tx * TILE + TILE / 2 - e.w / 2;
+        e.y = ty * TILE + TILE - e.h;
+      }
+      entities.add(e);
+    }
+
+    for (final m in moversSrc) {
+      final pathRaw = (m['path'] as List?)?.map((p) => Cell((p[0] as num) * TILE, (p[1] as num) * TILE)).toList() ?? [];
+      final a = pathRaw.isNotEmpty ? pathRaw[0] : Cell((m['x'] as num) * TILE, (m['y'] as num) * TILE);
+      movers.add(Mover(
+        a.x, a.y,
+        ((m['w'] ?? 3) as num) * TILE, ((m['h'] ?? 1) as num) * TILE,
+        pathRaw,
+        (m['speed'] ?? 1.2).toDouble(),
+        m['mode'] ?? 'loop',
+        a.x, a.y, ((m['w'] ?? 3) as num) * TILE, ((m['h'] ?? 1) as num) * TILE,
+        (pathRaw.length > 1 ? pathRaw[1] : a).x, (pathRaw.length > 1 ? pathRaw[1] : a).y,
+      ));
+    }
+
+    for (final ev in eventSrc) {
+      events.add({
+        'x': (ev['x'] as num) * TILE, 'y': (ev['y'] as num) * TILE,
+        'w': ((ev['w'] ?? 1) as num) * TILE, 'h': ((ev['h'] ?? 1) as num) * TILE,
+        'once': ev['once'] ?? true, 'fired': false,
+        'actions': ev['actions'] ?? [], 'hidden': ev['hidden'] ?? true,
+      });
+    }
+
+    final camPlaced = srcEntities.where((s) => s['type'] == 'camzone').length;
+    for (int i = camPlaced; i < camSrc.length; i++) {
+      final cfg = camSrc[i] as Map;
+      entities.add(Entity('camzone', i, cfg['x'] as int, cfg['y'] as int,
+          (cfg['x'] as num) * TILE, (cfg['y'] as num) * TILE,
+          ((cfg['w'] ?? 3) as num) * TILE, ((cfg['h'] ?? 3) as num) * TILE)
+        ..mode = cfg['mode'] ?? 'lock'
+        ..zoom = (cfg['zoom'] as num?)?.toDouble()
+        ..lx = (cfg['lx'] as num?)?.toDouble()
+        ..ly = (cfg['ly'] as num?)?.toDouble());
+    }
+
+    for (final e in entities) {
+      if (e.type == 'boss') bosses.add(Boss(this, e));
+    }
+
+    final sp = entities.firstWhere((e) => e.type == 'spawn', orElse: () => Entity('spawn', 0, 0, 0, 0, 0, 0, 0));
+    if (sp.type == 'spawn') {
+      spawn = Cell(sp.x + sp.w / 2 - 5.5, sp.y + sp.h - 21);
+    } else if (spawnExtra != null) {
+      spawn = Cell((spawnExtra[0] as num) * TILE, (spawnExtra[1] as num) * TILE);
+    } else {
+      spawn = Cell(40, 40);
+    }
+    totalApples = entities.where((e) => e.type == 'apple').length;
+    totalSaves = saveNo;
+  }
+
+  /// 死亡后的软重置：保留存档点与已拾取道具，其余复位（不清粒子/震屏）。
+  void softReset() {
+    vanish.clear();
+    vanishT?.clear();
+    bullets.clear();
+    ebullets.clear();
+    for (final m in movers) {
+      final a = m.path.isNotEmpty ? m.path[0] : Cell(m.x, m.y);
+      m.x = a.x; m.y = a.y; m.i = 0;
+      m.dx = 0; m.dy = 0;
+      final nx = m.path.length > 1 ? m.path[1] : a;
+      m.ax = m.x; m.ay = m.y; m.bx = nx.x; m.by = nx.y;
+    }
+    for (final e in entities) {
+      if (e.type == 'dropspike') {
+        if (e.temp) { e.dead = true; continue; }
+        e.y = e.homeY; e.falling = false; e.vy = 0; e.landed = false; e.landT = 0;
+      }
+      if (e.type == 'warp') e.cool = 0;
+    }
+    entities = entities.where((e) => !e.dead).toList();
+    for (final ev in events) ev['fired'] = false;
+    for (final b in bosses) {
+      b.hp = b.maxHp; b.dead = false; b.deathT = 0; b.bodyKill = true;
+      b.t = 0; b.state = 'idle'; b.stateT = 0; b.phase = 1;
+      b.x = b.homeX; b.y = b.homeY; b.vx = 0; b.vy = 0;
+    }
+  }
+
+  void addDeathMark(double x, double y) {
+    deathMarks.clear();
+    deathMarks.add(DeathMark(x, y));
+  }
+
+  void addDeathFX(double x, double y) {
+    deathFX.add(DeathFX(x, y, 0));
+  }
+
+  // ---------------- 查询 ----------------
+  Tile tileAt(int tx, int ty) {
+    if (tx < 0 || ty < 0 || tx >= w || ty >= h) return ty < 0 ? Tile.empty : Tile.block;
+    return tiles[ty][tx];
+  }
+
+  bool isSolidTile(Tile t, int tx, int ty) {
+    if (!solidTiles.contains(t)) return false;
+    if (t == Tile.vanish) {
+      final st = vanishState(tx, ty);
+      return st != 2;
+    }
+    return true;
+  }
+
+  int vanishState(int tx, int ty) => vanish[ty * 1000 + tx] ?? 0;
+  void setVanish(int tx, int ty, int st) => vanish[ty * 1000 + tx] = st;
+
+  bool solidRect(double x, double y, double ww, double hh, {bool dropThrough = false, double? prevBottom, Mover? moverExclude}) {
+    final x0 = (x / TILE).floor();
+    final x1 = ((x + ww - 0.001) / TILE).floor();
+    final y0 = (y / TILE).floor();
+    final y1 = ((y + hh - 0.001) / TILE).floor();
+    for (int ty = y0; ty <= y1; ty++) {
+      for (int tx = x0; tx <= x1; tx++) {
+        final t = tileAt(tx, ty);
+        if (t == Tile.oneway) {
+          if (!dropThrough && prevBottom != null && prevBottom <= ty * TILE + 6) {
+            if (y + hh <= ty * TILE + 8) continue;
+            if (prevBottom > ty * TILE + 2) continue;
+            return true;
+          }
+          continue;
+        }
+        if (isSolidTile(t, tx, ty)) return true;
+      }
+    }
+    for (final m in movers) {
+      if (m.gone) continue;
+      if (x < m.x + m.w && x + ww > m.x && y < m.y + m.h && y + hh > m.y) {
+        if (moverExclude == m) continue;
+        return true;
+      }
+    }
+    return false;
+  }
+
+  bool deadlyRect(double x, double y, double ww, double hh) {
+    final x0 = (x / TILE).floor();
+    final x1 = ((x + ww - 0.001) / TILE).floor();
+    final y0 = (y / TILE).floor();
+    final y1 = ((y + hh - 0.001) / TILE).floor();
+    for (int ty = y0; ty <= y1; ty++) {
+      for (int tx = x0; tx <= x1; tx++) {
+        final t = tileAt(tx, ty);
+        if (!deadlyTiles.contains(t)) continue;
+        final tr = spikeTri(t, tx * TILE, ty * TILE);
+        if (triRectOverlap(tr.ax, tr.ay, tr.bx, tr.by, tr.cx, tr.cy, x, y, ww, hh)) return true;
+      }
+    }
+    for (final e in entities) {
+      if (e.type == 'dropspike' && e.falling) {
+        final tr = spikeTri(Tile.spikeL, e.x, e.y);
+        if (triRectOverlap(tr.ax, tr.ay, tr.bx, tr.by, tr.cx, tr.cy, x, y, ww, hh)) return true;
+      }
+    }
+    for (final b in ebullets) {
+      if (b.dead) continue;
+      if (overlap(Box(x, y, ww, hh), Box(b.x, b.y, b.w, b.h))) return true;
+    }
+    for (final bs in bosses) {
+      if (bs.dead || !bs.bodyKill) continue;
+      if (overlap(Box(x, y, ww, hh), Box(bs.x, bs.y, bs.w, bs.h))) return true;
+    }
+    return false;
+  }
+
+  bool waterRect(double x, double y, double ww, double hh) {
+    final x0 = (x / TILE).floor();
+    final x1 = ((x + ww - 0.001) / TILE).floor();
+    final y0 = (y / TILE).floor();
+    final y1 = ((y + hh - 0.001) / TILE).floor();
+    for (int ty = y0; ty <= y1; ty++)
+      for (int tx = x0; tx <= x1; tx++)
+        if (tileAt(tx, ty) == Tile.water) return true;
+    return false;
+  }
+
+  bool iceAtBottom(double x, double y, double ww, double hh) {
+    final tx0 = (x / TILE).floor();
+    final tx1 = ((x + ww - 1) / TILE).floor();
+    final ty = ((y + hh + 1) / TILE).floor();
+    for (int tx = tx0; tx <= tx1; tx++) if (tileAt(tx, ty) == Tile.ice) return true;
+    return false;
+  }
+
+  // ---------------- 更新 ----------------
+  void update(int dt, Player player, Camera cam) {
+    time += dt;
+    final t = time;
+
+    for (int i = deathFX.length - 1; i >= 0; i--) {
+      if (++deathFX[i].t > 14) deathFX.removeAt(i);
+    }
+
+    for (final m in movers) {
+      if (m.path.isEmpty) continue;
+      final tgt = m.path[(m.i + 1) % m.path.length];
+      final ox = m.x, oy = m.y;
+      final dx = tgt.x - m.x, dy = tgt.y - m.y;
+      final dist = sqrt(dx * dx + dy * dy);
+      if (dist <= m.speed) {
+        m.x = tgt.x; m.y = tgt.y;
+        m.i = (m.i + 1) % m.path.length;
+      } else {
+        m.x += dx / dist * m.speed;
+        m.y += dy / dist * m.speed;
+      }
+      m.dx = m.x - ox; m.dy = m.y - oy;
+      final next = m.path[(m.i + 1) % m.path.length];
+      m.ax = m.x; m.ay = m.y; m.bx = next.x; m.by = next.y;
+    }
+
+    for (final key in List<int>.from(vanish.keys)) {
+      final st = vanish[key]!;
+      if (st == 0) continue;
+      final tt = (vanishT?[key] ?? 0) + 1;
+      vanishT ??= {};
+      vanishT![key] = tt;
+      if (st == 1 && tt > 55) { vanish[key] = 2; vanishT![key] = 0; }
+      else if (st == 2 && tt > 110) { vanish[key] = 0; vanishT![key] = 0; }
+    }
+
+    for (final e in entities) {
+      if (e.type != 'dropspike') continue;
+      if (!e.falling) {
+        final px = player.x + player.w / 2;
+        if ((px - (e.x + e.w / 2)).abs() < 26 && (player.y - e.y).abs() < 260 && player.y > e.y) {
+          e.falling = true; e.vy = 0;
+          Sfx.instance.vanish();
+        }
+      } else if (e.landed) {
+        e.landT++;
+        if (e.landT > 80) { e.dead = true; e.falling = false; }
+      } else {
+        e.vy = min(e.vy + 0.5, 11);
+        e.y += e.vy;
+        final ty = ((e.y + e.h) / TILE).floor();
+        final tx = ((e.x + e.w / 2) / TILE).floor();
+        if (isSolidTile(tileAt(tx, ty), tx, ty)) {
+          e.y = ty * TILE - e.h; e.vy = 0; e.landed = true; e.landT = 0;
+          shake = max(shake, 5);
+        }
+        if (e.y > pxH + 100) e.dead = true;
+      }
+    }
+
+    for (final e in entities) {
+      if (e.type != 'turret') continue;
+      e.t++;
+      if (e.t % (e.period) == 0) {
+        final cx = e.x + e.w / 2, cy = e.y + e.h / 2;
+        double vx = 0, vy = 0;
+        if (e.dir == 'left') vx = -e.speed;
+        else if (e.dir == 'right') vx = e.speed;
+        else if (e.dir == 'up') vy = -e.speed;
+        else vy = e.speed;
+        if (e.kind == 'aim' && player.alive) {
+          final dx = (player.x + player.w / 2) - cx, dy = (player.y + player.h / 2) - cy;
+          final d = max(sqrt(dx * dx + dy * dy), 1e-6);
+          vx = dx / d * e.speed; vy = dy / d * e.speed;
+        }
+        ebullets.add(EBullet(x: cx - 4, y: cy - 4, w: 8, h: 8, vx: vx, vy: vy, col: '#ff5c7a'));
+        Sfx.instance.shoot();
+      }
+    }
+
+    for (final b in ebullets) {
+      b.x += b.vx; b.y += b.vy; b.life--;
+      if (b.life <= 0) b.dead = true;
+      final tx = ((b.x + b.w / 2) / TILE).floor(), ty = ((b.y + b.h / 2) / TILE).floor();
+      if (isSolidTile(tileAt(tx, ty), tx, ty)) {
+        b.dead = true;
+        particles.spawn(b.x + 4, b.y + 4, 4, colors: const ['#ff5c7a', '#fff'], speed: 2, life: 14);
+      }
+    }
+    ebullets.removeWhere((b) => b.dead);
+
+    for (final b in bullets) {
+      b.x += b.vx; b.y += b.vy; b.life--;
+      if (b.life <= 0) b.dead = true;
+      final tx = ((b.x + b.w / 2) / TILE).floor(), ty = ((b.y + b.h / 2) / TILE).floor();
+      final tt = tileAt(tx, ty);
+      if (tt == Tile.block || tt == Tile.grass || tt == Tile.brick || tt == Tile.metal) {
+        b.dead = true;
+        particles.spawn(b.x + 3, b.y + 3, 5, colors: const ['#fff6a0', '#ffb040'], speed: 2.4, life: 16);
+      }
+    }
+    bullets.removeWhere((b) => b.dead);
+
+    for (final ev in events) {
+      if (ev['fired'] && ev['once']) continue;
+      if (overlap(Box(player.x, player.y, player.w, player.h), Box(ev['x'], ev['y'], ev['w'], ev['h']))) {
+        fireEvent(ev, player);
+      }
+    }
+
+    camZone = null;
+    for (final e in entities) {
+      if (e.type != 'camzone') continue;
+      if (overlap(Box(player.x + player.w / 2 - 1, player.y + player.h / 2 - 1, 2, 2), Box(e.x, e.y, e.w, e.h))) {
+        camZone = e;
+        break;
+      }
+    }
+
+    if (shake > 0) shake *= 0.86;
+    if (toastT > 0 && --toastT == 0) toast = null;
+    particles.update();
+  }
+
+  void fireEvent(Map ev, Player player) {
+    ev['fired'] = true;
+    for (final a in (ev['actions'] as List)) {
+      final type = a['type'];
+      if (type == 'msg') {
+        showToast(a['text'] ?? '', a['dur'] ?? 150);
+      } else if (type == 'spikes') {
+        for (int i = 0; i < (a['count'] ?? 5); i++) {
+          final x = ((a['x'] + i * (a['gap'] ?? 1)) as num) * TILE;
+          entities.add(Entity('dropspike', 0, 0, 0, x, ((a['y'] ?? 0) as num) * TILE, TILE, TILE)
+            ..falling = true
+            ..vy = 0
+            ..homeY = ((a['y'] ?? 0) as num) * TILE
+            ..temp = true);
+        }
+        Sfx.instance.troll();
+      } else if (type == 'vanish') {
+        for (int i = 0; i < (a['count'] ?? 3); i++) {
+          final tx = (a['x'] + i) as int, ty = a['y'] as int;
+          if (tileAt(tx, ty) == Tile.empty) continue;
+          setVanish(tx, ty, 1);
+          vanishT ??= {};
+          vanishT![ty * 1000 + tx] = 0;
+        }
+        Sfx.instance.vanish();
+      } else if (type == 'warp') {
+        player.x = (a['x'] as num) * TILE;
+        player.y = (a['y'] as num) * TILE;
+        player.vx = 0; player.vy = 0;
+        Sfx.instance.warp();
+      } else if (type == 'kill') {
+        player.kill();
+      } else if (type == 'shake') {
+        shake = (a['v'] ?? 10).toDouble();
+      }
+    }
+  }
+
+  void showToast(String text, [int dur = 150]) {
+    toast = text;
+    toastT = dur;
+  }
+
+  // ---------------- 绘制 ----------------
+  void drawBg(Canvas c, Camera cam, int t) {
+    final th = {
+      'jump': ['#1a1830', '#0a0a14'],
+      'endur': ['#101f24', '#080c10'],
+      'boss': ['#2a1018', '#0d0810'],
+      'troll': ['#221432', '#0b0812'],
+      'custom': ['#141428', '#08080f'],
+    }[bgTheme] ?? ['#1a1830', '#0a0a14'];
+    // 主题双色近似（顶/底）
+    c.drawRect(Rect.fromLTWH(0, 0, cam.w, cam.h), Paint()..color = hex(th[1]));
+    c.drawRect(Rect.fromLTWH(0, 0, cam.w, cam.h * 0.5), Paint()..color = hex(th[0]));
+
+    final px = -cam.x * 0.25, py = -cam.y * 0.15;
+    final sp = Paint()..color = const Color(0x29ffffff);
+    for (int i = 0; i < 60; i++) {
+      final nx = hashNoise(i, 7) * 2000, ny = hashNoise(i, 13) * 900;
+      final sx = ((nx + px) % (cam.w + 200)) - 100;
+      final sy = ((ny + py) % (cam.h + 120)) - 60;
+      c.drawRect(Rect.fromLTWH(sx, sy, 2, 2), sp);
+    }
+
+    final gp = Paint()..color = const Color(0x0affffff);
+    final off = TILE * 2;
+    final sx0 = -((cam.x % off));
+    final sy0 = -((cam.y % off));
+    for (double x = sx0; x < cam.w; x += off) {
+      c.drawLine(Offset(x + 0.5, 0), Offset(x + 0.5, cam.h), gp);
+    }
+    for (double y = sy0; y < cam.h; y += off) {
+      c.drawLine(Offset(0, y + 0.5), Offset(cam.w, y + 0.5), gp);
+    }
+  }
+
+  void draw(Canvas c, Camera cam, int t) {
+    final vx0 = max(0, (cam.x / TILE).floor() - 1);
+    final vx1 = min(w - 1, (((cam.x + cam.w / (cam.zoom)) / TILE).ceil() + 1));
+    final vy0 = max(0, (cam.y / TILE).floor() - 1);
+    final vy1 = min(h - 1, (((cam.y + cam.h / (cam.zoom)) / TILE).ceil() + 1));
+
+    for (int ty = vy0; ty <= vy1; ty++) {
+      for (int tx = vx0; tx <= vx1; tx++) {
+        final v = tiles[ty][tx];
+        if (v == Tile.empty) continue;
+        final x = tx * TILE, y = ty * TILE;
+        switch (v) {
+          case Tile.block: drawBlock(c, x, y, 0); break;
+          case Tile.grass: drawBlock(c, x, y, 1); break;
+          case Tile.brick: drawBlock(c, x, y, 2); break;
+          case Tile.metal: drawBlock(c, x, y, 3); break;
+          case Tile.ice: drawIce(c, x, y); break;
+          case Tile.water: drawWater(c, x, y, t); break;
+          case Tile.oneway: drawOneWay(c, x, y); break;
+          case Tile.killer: drawKiller(c, x, y, t); break;
+          case Tile.vanish: drawVanish(c, x, y, vanishState(tx, ty), t); break;
+          case Tile.spikeU: drawSpike(c, x, y, 0, t); break;
+          case Tile.spikeD: drawSpike(c, x, y, 1, t); break;
+          case Tile.spikeL: drawSpike(c, x, y, 2, t); break;
+          case Tile.spikeR: drawSpike(c, x, y, 3, t); break;
+          default: break;
+        }
+      }
+    }
+
+    for (final m in movers) drawMovingPlatform(c, m);
+
+    for (final e in entities) {
+      if (e.dead) continue;
+      switch (e.type) {
+        case 'save': drawSave(c, e, t); break;
+        case 'goal': drawGoal(c, e, t); break;
+        case 'gun': if (!e.taken) drawGun(c, e, t); break;
+        case 'apple': if (!e.taken) drawApple(c, e, t); break;
+        case 'jumpref': drawJumpRef(c, e.x, e.y, t); break;
+        case 'warp': if (!e.hidden) drawWarp(c, e, t); break;
+        case 'sign': drawSign(c, e, t); break;
+        case 'turret': drawTurret(c, e, t); break;
+        case 'camzone': drawCamera(c, e, t); break;
+        case 'dropspike': drawDropSpike(c, e, t); break;
+        default: break;
+      }
+    }
+
+    for (final b in bullets) drawBullet(c, b);
+    for (final b in ebullets) drawEBullet(c, b, t);
+
+    for (final dm in deathMarks) drawDeathMark(c, dm);
+    for (final fx in deathFX) drawDeathRing(c, fx);
+
+    particles.draw(c);
+  }
+
+  void drawOverlay(Canvas c, Camera cam, int t) {
+    for (final e in entities) {
+      if (e.type != 'sign') continue;
+      final sx = (e.x + e.w / 2 - cam.x) * (cam.zoom);
+      final sy = (e.y - 6 - cam.y) * (cam.zoom);
+      if (sx < -80 || sx > cam.w + 80) continue;
+      final txt = e.text ?? '';
+      final tp = TextPainter(
+        text: TextSpan(text: txt, style: TextStyle(color: const Color(0xffffe9a8), fontSize: 11, fontFamily: 'Courier')),
+        textDirection: TextDirection.ltr,
+      );
+      tp.layout();
+      c.drawRect(Rect.fromLTWH(sx - tp.width / 2 - 5, sy - 13, tp.width + 10, 16), Paint()..color = rgba(0, 0, 0, 0.72));
+      tp.paint(c, Offset(sx - tp.width / 2, sy));
+    }
+  }
+}
+
+// ---------------- 三角刺顶点与 SAT 判定 ----------------
+class Tri {
+  final double ax, ay, bx, by, cx, cy;
+  Tri(this.ax, this.ay, this.bx, this.by, this.cx, this.cy);
+}
+
+Tri spikeTri(Tile t, double x, double y) {
+  const s = TILE;
+  if (t == Tile.spikeU) return Tri(x + s / 2, y, x, y + s, x + s, y + s);
+  if (t == Tile.spikeD) return Tri(x + s / 2, y + s, x, y, x + s, y);
+  if (t == Tile.spikeL) return Tri(x, y + s / 2, x + s, y, x + s, y + s);
+  if (t == Tile.spikeR) return Tri(x + s, y + s / 2, x, y, x, y + s);
+  return Tri(x, y, x + s, y, x, y + s);
+}
+
+bool triRectOverlap(double ax, double ay, double bx, double by, double cx, double cy,
+    double rx, double ry, double rw, double rh) {
+  final rMinX = rx, rMaxX = rx + rw, rMinY = ry, rMaxY = ry + rh;
+  final tMinX = min(ax, min(bx, cx)), tMaxX = max(ax, max(bx, cx));
+  final tMinY = min(ay, min(by, cy)), tMaxY = max(ay, max(by, cy));
+  if (tMaxX < rMinX || tMinX > rMaxX || tMaxY < rMinY || tMinY > rMaxY) return false;
+  final edges = [[bx - ax, by - ay], [cx - bx, cy - by], [ax - cx, ay - cy]];
+  for (final e in edges) {
+    final ex = e[0] as double, ey = e[1] as double;
+    final nx = -ey, ny = ex;
+    final t0 = nx * ax + ny * ay, t1 = nx * bx + ny * by, t2 = nx * cx + ny * cy;
+    final tMin = min(t0, min(t1, t2)), tMax = max(t0, max(t1, t2));
+    final p0 = nx * rMinX + ny * rMinY, p1 = nx * rMaxX + ny * rMinY;
+    final p2 = nx * rMinX + ny * rMaxY, p3 = nx * rMaxX + ny * rMaxY;
+    final rMin = min(p0, min(p1, min(p2, p3))), rMax = max(p0, max(p1, max(p2, p3)));
+    if (tMax < rMin || rMax < tMin) return false;
+  }
+  return true;
+}
diff --git a/app/lib/src/game/levels.dart b/app/lib/src/game/levels.dart
new file mode 100644
index 0000000..e2c4738
--- /dev/null
+++ b/app/lib/src/game/levels.dart
@@ -0,0 +1,66 @@
+// 关卡清单：从 assets/levels.json 加载内置关卡，并提供与 web 版
+// levels/index.js 一致的 TYPE_LABEL / TYPE_CLASS / makeCustomLevel / findLevel。
+import 'dart:convert';
+import 'package:flutter/services.dart' show rootBundle;
+import 'package:iwbtc/src/core/save.dart';
+
+const Map<String, String> TYPE_LABEL = {
+  'jump': '跳刺',
+  'endur': '耐久',
+  'boss': 'BOSS',
+  'troll': '坑向',
+  'custom': '自制',
+};
+
+const Map<String, String> TYPE_CLASS = {
+  'jump': 't-jump',
+  'endur': 't-endur',
+  'boss': 't-boss',
+  'troll': 't-troll',
+  'custom': 't-custom',
+};
+
+List<Map<String, dynamic>> _builtin = <Map<String, dynamic>>[];
+bool _loaded = false;
+
+/// 加载内置关卡（assets/levels.json）。重复调用安全。
+Future<void> loadLevels() async {
+  if (_loaded) return;
+  final s = await rootBundle.loadString('assets/levels.json');
+  final m = (jsonDecode(s) as Map).cast<String, dynamic>();
+  final list = ((m['levels'] as List?) ?? <dynamic>[])
+      .cast<Map<String, dynamic>>()
+      .toList();
+  for (int i = 0; i < list.length; i++) {
+    list[i] = <String, dynamic>{...list[i], 'index': i, 'builtin': true};
+  }
+  _builtin = list;
+  _loaded = true;
+}
+
+/// 内置关卡清单（已标注 index / builtin）。
+List<Map<String, dynamic>> get LEVELS => _builtin;
+
+/// 合成一张自制关卡数据对象（与 web makeCustomLevel 一致）。
+Map<String, dynamic> makeCustomLevel(Map<String, dynamic> data) {
+  return <String, dynamic>{
+    ...data,
+    'id': 'u' + (DateTime.now().millisecondsSinceEpoch % 100000).toString() + (_uid++).toString(),
+    'type': 'custom',
+    'builtin': false,
+    'index': -1,
+  };
+}
+
+int _uid = 0;
+
+/// 按 id 查找关卡（内置优先，其次自制）。
+Map<String, dynamic>? findLevel(String id) {
+  for (final l in _builtin) {
+    if (l['id'] == id) return l;
+  }
+  for (final l in Save.customs()) {
+    if (l['id'] == id) return l as Map<String, dynamic>;
+  }
+  return null;
+}
diff --git a/app/lib/src/game/particles.dart b/app/lib/src/game/particles.dart
new file mode 100644
index 0000000..bbb5ecc
--- /dev/null
+++ b/app/lib/src/game/particles.dart
@@ -0,0 +1,66 @@
+// 粒子系统。与 web 版 particles.js 1:1 对应。
+import 'dart:ui' show Canvas, Paint, Color, Rect;
+import 'dart:math' show cos, sin, min, max, sqrt, atan2, pi;
+import 'package:iwbtc/src/core/util.dart';
+
+class Particle {
+  double x, y, vx, vy;
+  int life, max;
+  Color c;
+  double s, g;
+  Particle(this.x, this.y, this.vx, this.vy, this.life, this.max, this.c, this.s, this.g);
+}
+
+class Particles {
+  final List<Particle> list = [];
+
+  void clear() => list.clear();
+
+  void spawn(double x, double y, int n,
+      {List<String> colors = const ['#fff', '#ff5c7a', '#ffc63a'],
+      double speed = 3,
+      int life = 40,
+      double size = 3,
+      double grav = 0.12,
+      double spread = 6.283185307179586,
+      double dir = 0}) {
+    for (int i = 0; i < n; i++) {
+      final a = dir + (rand(-0.5, 0.5)) * spread;
+      final s = rand(speed * 0.35, speed);
+      list.add(Particle(
+        x,
+        y,
+        cos(a) * s,
+        sin(a) * s,
+        (life * rand(0.6, 1.25)).round(),
+        life,
+        hex(colors[randInt(0, colors.length - 1)]),
+        size * rand(0.6, 1.3),
+        grav,
+      ));
+    }
+  }
+
+  void burst(double x, double y, {int n = 18, double speed = 3, int life = 40, double size = 3, double grav = 0.12, List<String> colors = const ['#fff', '#ff5c7a', '#ffc63a']}) {
+    spawn(x, y, n, colors: colors, speed: speed, life: life, size: size, grav: grav);
+  }
+
+  void update() {
+    for (int i = list.length - 1; i >= 0; i--) {
+      final p = list[i];
+      p.x += p.vx;
+      p.y += p.vy;
+      p.vy += p.g;
+      p.vx *= 0.985;
+      if (--p.life <= 0) list.removeAt(i);
+    }
+  }
+
+  void draw(Canvas canvas) {
+    final paint = Paint();
+    for (final p in list) {
+      paint.color = p.c.withAlpha((min(1.0, p.life / (p.max * 0.5)) * 255).round().clamp(0, 255));
+      canvas.drawRect(Rect.fromLTWH(p.x.floorToDouble(), p.y.floorToDouble(), p.s.floorToDouble(), p.s.floorToDouble()), paint);
+    }
+  }
+}
diff --git a/app/lib/src/game/player.dart b/app/lib/src/game/player.dart
new file mode 100644
index 0000000..334d51c
--- /dev/null
+++ b/app/lib/src/game/player.dart
@@ -0,0 +1,383 @@
+// 玩家：还原 IWBT 的硬核手感 —— 松手即停、无加速、可变跳跃高度、二段跳。
+// 与 web 版 player.js 1:1 对应（逐帧积分完全一致，保证手感）。
+import 'dart:ui' show Canvas;
+import 'dart:math' show pi, max, min;
+import 'package:iwbtc/src/core/util.dart';
+import 'package:iwbtc/src/core/input.dart';
+import 'package:iwbtc/src/audio/sfx.dart';
+import 'package:iwbtc/src/game/sprites.dart';
+import 'package:iwbtc/src/game/views.dart';
+import 'package:iwbtc/src/game/level.dart' show Level, Tile, Mover, Cell, Bullet;
+
+class SavePoint {
+  double x, y;
+  int face;
+  SavePoint(this.x, this.y, this.face);
+}
+
+class PHY {
+  static const double GRAV = 0.25;
+  static const double GRAV_FALL = 0.32;
+  static const double GRAV_DJ = 0.35;
+  static const double MAXFALL = 9;
+  static const double JUMP = 6.6;
+  static const double DJUMP = 6.7;
+  static const double DJ_INERTIA = 0;
+  static const double HSPD = 2.6;
+  static const double WATER_GRAV = 0.16;
+  static const double WATER_FALL = 2.6;
+  static const double WATER_RISE = 0.42;
+  static const double ICE_ACC = 0.18;
+  static const double ICE_FRIC = 0.07;
+  static const double SLIDE_FRIC = 0.12;
+  static const double SLIDE_AIR = 0.02;
+  static const double SLIDE_EASE = 0.14;
+  static const double SLIDE_BRAKE = 0.45;
+  static const double SLIDE_MIN = 0.35;
+  static const double SLIDE_STOP = 0.05;
+  static const double ICE_TOP = 1.6;
+}
+
+class Player implements PlayerView {
+  Level level;
+  double w = 11, h = 21;
+  double x = 0, y = 0;
+  double vx = 0, vy = 0;
+  int jumps = 0;
+  bool djUp = false;
+  bool grounded = false;
+  int facing = 1;
+  bool alive = true;
+  bool dead = false;
+  int deadT = 0;
+  double deathX = 0, deathY = 0;
+  bool inWater = false;
+  int animT = 0;
+  int shootCool = 0;
+  Mover? mover;
+  bool sliding = false;
+  bool justRespawned = false;
+  bool hasGun = false;
+  int apples = 0;
+  SavePoint? savePoint;
+  int saveIdx = 0;
+  bool clearing = false;
+
+  // 回调（由 World 设置）
+  void Function()? onDeath;
+  void Function()? onClear;
+  void Function(dynamic e)? onPortal;
+  void Function()? onRespawnFace;
+
+  Player(this.level) {
+    reset(true);
+  }
+
+  double get cx => x + w / 2;
+  double get cy => y + h / 2;
+
+  void reset(bool full) {
+    final sp = (full || savePoint == null)
+        ? SavePoint(level.spawn.x, level.spawn.y, level.faceIndex ?? 0)
+        : savePoint!;
+    x = sp.x; y = sp.y;
+    vx = 0; vy = 0;
+    jumps = 0;
+    djUp = false;
+    grounded = false;
+    facing = 1;
+    alive = true;
+    dead = false;
+    deadT = 0;
+    deathX = 0; deathY = 0;
+    inWater = false;
+    animT = 0;
+    shootCool = 0;
+    mover = null;
+    sliding = false;
+    justRespawned = false;
+    if (full) {
+      hasGun = level.data['startGun'] == true;
+      apples = 0;
+      savePoint = null;
+      saveIdx = 0;
+    }
+  }
+
+  /// 纯死亡演出（不进死亡状态）：粒子爆开 + 屏幕轻震 + 死亡点扩散冲击环。
+  void deathBurst() {
+    final L = level;
+    final dx = clamp(cx, 10, max(10, L.pxW - 10));
+    final dy = clamp(cy, 10, max(10, L.pxH - 10));
+    Sfx.instance.death();
+    L.particles.spawn(dx, dy, 16, colors: const ['#ff5c7a', '#ff8095', '#fff', '#ffc63a'], speed: 3.4, life: 34, size: 3, grav: 0.16);
+    L.shake = max(L.shake, 6);
+    L.addDeathFX(dx, dy);
+    deathX = dx; deathY = dy;
+  }
+
+  void kill([Map opts = const {}]) {
+    if (dead || !alive) return;
+    dead = true; alive = false; deadT = 0;
+    vx = 0; vy = 0; sliding = false;
+    deathBurst();
+    if (opts['mark'] != false) level.addDeathMark(deathX, deathY);
+    if (opts['count'] != false && onDeath != null) onDeath!();
+  }
+
+  void respawn() {
+    dead = false; alive = true;
+    final L = level;
+    final sp = savePoint ?? SavePoint(L.spawn.x, L.spawn.y, 0);
+    x = sp.x; y = sp.y;
+    vx = 0; vy = 0; jumps = 0;
+    djUp = false;
+    shootCool = 0; sliding = false;
+    deadT = 0;
+    int guard = 0;
+    while (L.solidRect(x, y, w, h) && guard++ < 48) y -= 2;
+    L.softReset();
+    justRespawned = true;
+  }
+
+  void update(int dt) {
+    final L = level;
+    animT++;
+    if (shootCool > 0) shootCool--;
+
+    if (dead) { deadT++; return; }
+
+    final inWater = L.waterRect(x + 2, y + 4, w - 4, h - 4);
+    if (inWater && !this.inWater) Sfx.instance.splash();
+    this.inWater = inWater;
+
+    final moveL = Input.held('left'), moveR = Input.held('right');
+    final onIce = grounded && L.iceAtBottom(x, y, w, h);
+    double target = 0;
+    if (moveL && !moveR) target = -PHY.HSPD;
+    else if (moveR && !moveL) target = PHY.HSPD;
+
+    final ICE_MAX = PHY.HSPD * PHY.ICE_TOP;
+    final decel = (double f) {
+      if (vx.abs() <= f) vx = 0;
+      else vx -= sgn(vx) * f;
+    };
+
+    if (onIce) {
+      if (target != 0) vx += sgn(target) * PHY.ICE_ACC;
+      else decel(PHY.ICE_FRIC);
+      vx = clamp(vx, -ICE_MAX, ICE_MAX);
+      if (vx.abs() > PHY.SLIDE_MIN) sliding = true;
+    } else if (sliding && vx.abs() > PHY.SLIDE_STOP) {
+      if (target != 0) {
+        final dir = sgn(vx);
+        if (dir == 0 || sgn(target) == dir) {
+          if (vx.abs() >= PHY.HSPD) {
+            vx -= dir * PHY.SLIDE_EASE;
+            if (vx.abs() < PHY.HSPD) { vx = target; sliding = false; }
+          } else {
+            vx = target; sliding = false;
+          }
+        } else {
+          vx -= dir * PHY.SLIDE_BRAKE;
+          if (sgn(vx) == sgn(target)) { vx = target; sliding = false; }
+        }
+        vx = clamp(vx, -ICE_MAX, ICE_MAX);
+      } else {
+        decel(grounded ? PHY.SLIDE_FRIC : PHY.SLIDE_AIR);
+        if (vx == 0) sliding = false;
+      }
+      if (vx != 0 && vx.abs() < PHY.SLIDE_STOP) { vx = 0; sliding = false; }
+    } else {
+      vx = target;
+      sliding = false;
+    }
+    if (target != 0) facing = sgn(target).toInt();
+
+    if (inWater) {
+      if (Input.held('jump')) vy -= PHY.WATER_RISE;
+      if (Input.held('down')) vy += 0.25;
+      vy = clamp(vy, -3.2, PHY.WATER_FALL);
+      jumps = 0; djUp = false;
+    } else {
+      if (Input.hit('jump')) {
+        if (grounded || jumps == 0) {
+          vy = -PHY.JUMP; jumps = 1; grounded = false;
+          Sfx.instance.jump();
+          L.particles.spawn(cx, y + h, 5, colors: const ['#fff', '#cfcfe0'], speed: 1.6, life: 16, size: 2, dir: -pi / 2, spread: 2);
+        } else if (jumps == 1) {
+          vy = max(vy, 0) * PHY.DJ_INERTIA - PHY.DJUMP; jumps = 2;
+          djUp = vy < 0;
+          Sfx.instance.djump();
+          L.particles.spawn(cx, cy, 10, colors: const ['#fff', '#9ad8ff'], speed: 2.2, life: 20, size: 2, spread: pi * 2);
+        }
+      }
+      if (!Input.held('jump') && vy < -3) vy = -3;
+      vy = min(vy + (vy < 0 ? (djUp ? PHY.GRAV_DJ : PHY.GRAV) : PHY.GRAV_FALL), PHY.MAXFALL);
+      if (djUp && vy >= 0) djUp = false;
+    }
+
+    if (mover != null && !(mover!.gone)) {
+      x += mover!.dx;
+      y += mover!.dy;
+    }
+
+    // X 轴移动
+    final prevBottom = y + h;
+    mover = null;
+    double steps = vx.abs();
+    final dx = sgn(vx).toDouble();
+    while (steps > 0) {
+      final m = min(1, steps);
+      if (!L.solidRect(x + dx * m, y, w, h)) { x += dx * m; steps -= m; }
+      else break;
+    }
+    if (L.solidRect(x + dx, y, w, h) && vx.abs() > 0) vx = 0;
+
+    // Y 轴移动
+    final dropThrough = Input.held('down');
+    steps = vy.abs();
+    final dy = sgn(vy).toDouble();
+    bool hitGround = false;
+    while (steps > 0) {
+      final m = min(1, steps);
+      final ny = y + dy * m;
+      final solidHere = L.solidRect(x, ny, w, h, prevBottom: prevBottom, dropThrough: dropThrough);
+      if (!solidHere) { y = ny; steps -= m; }
+      else {
+        if (dy > 0) hitGround = true;
+        vy = 0;
+        break;
+      }
+    }
+    for (final m in L.movers) {
+      if (m.gone) continue;
+      if (x + w > m.x && x < m.x + m.w) {
+        if (y + h >= m.y - 2 && y + h <= m.y + m.h) {
+          mover = m; hitGround = true;
+        }
+      }
+    }
+
+    final wasAir = !grounded;
+    grounded = hitGround || (vy == 0 && L.solidRect(x, y + 1, w, h));
+    if (grounded) {
+      jumps = 0; djUp = false;
+    }
+
+    if (sliding && grounded && vx.abs() > PHY.HSPD && animT % 5 == 0) {
+      L.particles.spawn(cx - sgn(vx) * 5, y + h - 2, 2, colors: const ['#dff4ff', '#8fd8f0', '#fff'], speed: 1.1, life: 16, size: 2, dir: -pi / 2, spread: 1.7, grav: 0.1);
+    }
+
+    x = clamp(x, 0, L.pxW - w);
+    if (y > L.pxH + 200) { kill(); return; }
+    if (y < -300) { y = -300; vy = 0; }
+
+    if (L.deadlyRect(x, y, w, h)) { kill(); return; }
+
+    if (hasGun && Input.hit('shoot') && shootCool == 0 && L.bullets.length < 5) {
+      shoot();
+    }
+
+    touchEntities();
+
+    if (grounded) {
+      final ty = ((y + h + 2) / TILE).floor();
+      for (int tx = (x / TILE).floor(); tx <= ((x + w - 1) / TILE).floor(); tx++) {
+        if (ty < L.tiles.length && tx >= 0 && tx < L.tiles[0].length && L.tiles[ty][tx] == Tile.vanish && L.vanishState(tx, ty) == 0) {
+          L.setVanish(tx, ty, 1);
+          L.vanishT ??= {};
+          L.vanishT![ty * 1000 + tx] = 0;
+        }
+      }
+    }
+  }
+
+  void shoot() {
+    final L = level;
+    shootCool = 9;
+    L.bullets.add(Bullet(
+      x: facing > 0 ? x + w - 2 : x - 6,
+      y: y + 8, w: 10.0, h: 5.0,
+      vx: 9.0 * facing, vy: 0.0, life: 130,
+    ));
+    Sfx.instance.shoot();
+    L.particles.spawn(facing > 0 ? x + w : x, y + 10, 3, colors: const ['#fff6a0'], speed: 1.5, life: 10, size: 2);
+  }
+
+  void touchEntities() {
+    final L = level;
+    for (final e in L.entities) {
+      if (e.dead) continue;
+      final hit = e.type == 'save'
+          ? overlap(Box(x - 6, y - 6, w + 12, h + 12), Box(e.x, e.y, e.w, e.h))
+          : overlap(Box(x, y, w, h), Box(e.x, e.y, e.w, e.h));
+      if (!hit) continue;
+      switch (e.type) {
+        case 'save':
+          if (!e.active) {
+            e.active = true;
+            savePoint = SavePoint(e.x + e.w / 2 - w / 2, e.y + e.h - h, level.faceIndex ?? 0);
+            saveIdx = e.no ?? 1;
+            Sfx.instance.save();
+            L.particles.spawn(e.x + e.w / 2, e.y + e.h / 2, 18, colors: const ['#b06bff', '#fff', '#e5d0ff'], speed: 2.6, life: 30);
+            if (e.fake) { L.showToast('假的。', 90); kill(); return; }
+          }
+          break;
+        case 'goal':
+          if (!clearing) { clearing = true; if (onClear != null) onClear!(); }
+          break;
+        case 'gun':
+          if (!e.taken) {
+            e.taken = true; hasGun = true;
+            L.particles.spawn(e.x + e.w / 2, e.y + e.h / 2, 12, colors: const ['#dfe0f0', '#fff'], speed: 2.2, life: 24);
+            L.showToast('获得手枪！按 X 射击', 120);
+            Sfx.instance.save();
+          }
+          break;
+        case 'apple':
+          if (!e.taken) { e.taken = true; apples++; Sfx.instance.save(); }
+          break;
+        case 'jumpref':
+          if (animT % 4 == 0) jumps = 0;
+          break;
+        case 'warp':
+          if (e.cool > 0) break;
+          e.cool = 40;
+          final to = e.to;
+          if (to != null && to is Map && !to.containsKey('x') && !to.containsKey('y') && to['face'] is int) {
+            if (onPortal != null) onPortal!(e);
+            break;
+          }
+          double? nx, ny;
+          if (to == 'spawn') {
+            nx = L.spawn.x; ny = L.spawn.y;
+          } else if (to != null && to is Map && to.containsKey('x')) {
+            nx = (to['x'] as num) * TILE; ny = (to['y'] as num) * TILE;
+          } else {
+            final p = L.entities.firstWhere((o) => o.type == 'warp' && o.idx == e.pair, orElse: () => e);
+            if (p != e) {
+              nx = p.x + p.w / 2 - w / 2; ny = p.y + p.h - h;
+            }
+          }
+          if (nx != null && ny != null) {
+            x = nx; y = ny;
+            vx = 0; vy = 0;
+            final partner = L.entities.firstWhere((o) => o.type == 'warp' && o.idx == e.pair, orElse: () => e);
+            if (partner != e) partner.cool = 40;
+            Sfx.instance.warp();
+            L.particles.spawn(cx, cy, 12, colors: const ['#a86bff', '#fff'], speed: 2.5, life: 24);
+          }
+          break;
+        case 'sign':
+          if (animT % 30 == 0) L.showToast(e.text ?? '', 90);
+          break;
+      }
+    }
+  }
+
+  void draw(Canvas c) {
+    if (dead) return;
+    drawKid(c, this, animT);
+  }
+}
diff --git a/app/lib/src/game/sprites.dart b/app/lib/src/game/sprites.dart
new file mode 100644
index 0000000..b468258
--- /dev/null
+++ b/app/lib/src/game/sprites.dart
@@ -0,0 +1,448 @@
+// 程序化像素绘制（无外部图片资源）。对应 web 版 sprites.js。
+// 全部使用 Flutter dart:ui 的 Canvas / Paint / Path，逐函数镜像。
+import 'dart:ui' show Canvas, Paint, Path, Rect, Color, Offset, PaintingStyle, StrokeCap, TextAlign;
+import 'dart:math' show sin, cos, pi, max, min, sqrt, atan2;
+import 'package:flutter/widgets.dart';
+import 'package:iwbtc/src/core/util.dart';
+import 'package:iwbtc/src/game/views.dart';
+
+Color rgba(int r, int g, int b, double a) =>
+    Color.fromARGB((a * 255).round().clamp(0, 255), r, g, b);
+
+class C {
+  static const Color stone = Color(0xff6b6b7e);
+  static const Color stoneDark = Color(0xff3a3a48);
+  static const Color stoneLite = Color(0xff8f8fa6);
+  static const Color grass = Color(0xff4f9e46);
+  static const Color grassDark = Color(0xff2c5c2b);
+  static const Color brick = Color(0xffa8543c);
+  static const Color brickDark = Color(0xff632a1d);
+  static const Color metal = Color(0xff5a6478);
+  static const Color metalDark = Color(0xff333a4a);
+  static const Color ice = Color(0xff8fd8f0);
+  static const Color iceDark = Color(0xff4a90b8);
+  static const Color water = Color(0xff2a6fd8);
+  static const Color spike = Color(0xffcfdde9);
+  static const Color spikeDark = Color(0xffa8bccf);
+  static const Color kid = Color(0xffd94a55);
+  static const Color kidDark = Color(0xff8e2530);
+  static const Color skin = Color(0xfff5cfa8);
+  static const Color hair = Color(0xff5a3a22);
+  static const Color pant = Color(0xff2c3a7a);
+  static const Color save = Color(0xffb06bff);
+  static const Color goal = Color(0xffffc63a);
+  static const Color gun = Color(0xffb8b8c8);
+  static const Color apple = Color(0xffe03050);
+}
+
+void px(Canvas c, double x, double y, double w, double h, Color col) {
+  final p = Paint()..color = col;
+  c.drawRect(Rect.fromLTWH(x, y, w, h), p);
+}
+
+// ---------------- 地形 ----------------
+void drawBlock(Canvas c, double x, double y, int variant, [bool lit = false]) {
+  const s = TILE;
+  Color base = C.stone, dark = C.stoneDark, lite = C.stoneLite;
+  if (variant == 1) {
+    base = C.grass; dark = C.grassDark; lite = const Color(0xff7fd06a);
+  } else if (variant == 2) {
+    base = C.brick; dark = C.brickDark; lite = const Color(0xffd1785c);
+  } else if (variant == 3) {
+    base = C.metal; dark = C.metalDark; lite = const Color(0xff8a94ad);
+  }
+  px(c, x, y, s, s, dark);
+  px(c, x + 1, y + 1, s - 2, s - 2, base);
+  if (variant == 2) {
+    px(c, x + 1, y + 8, s - 2, 1, dark);
+    px(c, x + 1, y + 17, s - 2, 1, dark);
+    px(c, x + 10, y + 1, 1, 7, dark);
+    px(c, x + 20, y + 9, 1, 8, dark);
+    px(c, x + 6, y + 18, 1, 7, dark);
+  } else if (variant == 1) {
+    px(c, x + 1, y + 1, s - 2, 5, lite);
+    for (int i = 0; i < 4; i++) px(c, x + 3 + i * 7, y + 2, 1, 4, dark);
+  } else {
+    final n = hashNoise(x.round(), y.round());
+    px(c, x + 2, y + 2, 6, 2, lite);
+    if (n > 0.5) px(c, x + 18, y + 12, 8, 2, dark);
+    if (n < 0.35) px(c, x + 6, y + 22, 7, 2, dark);
+  }
+  px(c, x, y, s, 1, lite);
+  px(c, x, y, 1, s, lite);
+  px(c, x, y + s - 1, s, 1, dark);
+  px(c, x + s - 1, y, 1, s, dark);
+  if (lit) px(c, x, y, s, s, rgba(255, 255, 255, 0.09));
+}
+
+void drawIce(Canvas c, double x, double y) {
+  const s = TILE;
+  px(c, x, y, s, s, C.iceDark);
+  px(c, x + 1, y + 1, s - 2, s - 2, C.ice);
+  px(c, x + 2, y + 3, 10, 3, const Color(0xffe6fbff));
+  px(c, x + 18, y + 16, 8, 2, rgba(255, 255, 255, 0.7));
+  px(c, x, y, s, 1, const Color(0xffe6fbff));
+  px(c, x, y + s - 1, s, 1, C.iceDark);
+}
+
+void drawWater(Canvas c, double x, double y, int t) {
+  const s = TILE;
+  px(c, x, y, s, s, rgba(40, 110, 215, 0.55));
+  final off = sin(t / 260 + x * 0.09) * 3;
+  px(c, x, y + 4 + off, s, 3, rgba(120, 200, 255, 0.35));
+  px(c, x, y + 16 - off, s, 2, rgba(120, 200, 255, 0.35));
+}
+
+void drawOneWay(Canvas c, double x, double y) {
+  const s = TILE;
+  px(c, x, y, s, 6, C.metalDark);
+  px(c, x, y, s, 3, const Color(0xff9aa6bd));
+  for (int i = 0; i < 8; i++) px(c, x + i * 4, y + 6, 2, 3, C.metalDark);
+}
+
+void drawSpike(Canvas c, double x, double y, int dir, int t) {
+  const s = TILE;
+  late double ax, ay, bx, by, cx2, cy2;
+  if (dir == 0) {
+    ax = x + s / 2; ay = y; bx = x; by = y + s; cx2 = x + s; cy2 = y + s;
+  } else if (dir == 1) {
+    ax = x + s / 2; ay = y + s; bx = x; by = y; cx2 = x + s; cy2 = y;
+  } else if (dir == 2) {
+    ax = x; ay = y + s / 2; bx = x + s; by = y; cx2 = x + s; cy2 = y + s;
+  } else {
+    ax = x + s; ay = y + s / 2; bx = x; by = y; cx2 = x; cy2 = y + s;
+  }
+  late Offset from, to;
+  if (dir == 0) { from = Offset(x, y); to = Offset(x, y + s); }
+  else if (dir == 1) { from = Offset(x, y + s); to = Offset(x, y); }
+  else if (dir == 2) { from = Offset(x, y); to = Offset(x + s, y); }
+  else { from = Offset(x + s, y); to = Offset(x, y); }
+  final rect = Rect.fromLTWH(x, y, s, s);
+  final g = LinearGradient(
+    begin: _gradAlign(from, rect), end: _gradAlign(to, rect),
+    colors: const [Color(0xfff4f9fd), Color(0xffcfdde9), Color(0xffa8bccf)],
+  );
+  final p = Path();
+  p.moveTo(ax, ay); p.lineTo(bx, by); p.lineTo(cx2, cy2); p.close();
+  final paint = Paint()..shader = g.createShader(rect);
+  c.drawPath(p, paint);
+  final stroke = Paint()
+    ..color = rgba(150, 175, 200, 0.9)
+    ..style = PaintingStyle.stroke
+    ..strokeWidth = 1;
+  c.drawPath(p, stroke);
+}
+
+void drawKiller(Canvas c, double x, double y, int t) {
+  const s = TILE;
+  final bob = sin(t / 300 + x) * 1.5;
+  c.save();
+  c.translate(x + s / 2, y + s / 2 + bob);
+  final p = Paint()..color = C.apple;
+  c.drawCircle(Offset(0, 2), 11, p);
+  final p2 = Paint()..color = const Color(0xffff7a90);
+  c.drawCircle(Offset(-4, -2), 4, p2);
+  px(c, -1, -13, 2, 6, const Color(0xff6b4423));
+  final leaf = Paint()..color = const Color(0xff3ddc84);
+  c.drawOval(Rect.fromLTWH(1, -13, 10, 5.2), leaf);
+  px(c, -5, 0, 2, 2, const Color(0xff000000));
+  px(c, 3, 0, 2, 2, const Color(0xff000000));
+  c.restore();
+}
+
+void drawVanish(Canvas c, double x, double y, int state, int t) {
+  const s = TILE;
+  final alpha = state == 0 ? 1.0 : state == 1 ? (sin(t / 60) > 0 ? 0.55 : 0.9) : 0.14;
+  drawBlock(c, x, y, 3);
+  if (alpha < 1) {
+    // 模拟 globalAlpha：用半透明黑覆盖来压暗
+    px(c, x, y, s, s, Color.fromARGB(((1 - alpha) * 255).round().clamp(0, 255), 0, 0, 0));
+  }
+  if (state != 2) {
+    final sp = Paint()
+      ..color = rgba(255, 200, 60, 0.55)
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 1;
+    c.drawRect(Rect.fromLTWH(x + 2.5, y + 2.5, s - 5, s - 5), sp);
+  }
+}
+
+void drawJumpRef(Canvas c, double x, double y, int t) {
+  const s = TILE;
+  final b = sin(t / 200 + x) * 2;
+  final p = Path();
+  p.moveTo(x + s / 2, y + 8 + b);
+  p.lineTo(x + s - 6, y + s - 10 + b);
+  p.lineTo(x + 6, y + s - 10 + b);
+  p.close();
+  c.drawPath(p, Paint()..color = const Color(0xff3ddc84));
+  final sp = Paint()
+    ..color = const Color(0xff0d5c30)
+    ..style = PaintingStyle.stroke
+    ..strokeWidth = 1;
+  c.drawPath(p, sp);
+}
+
+// ---------------- 玩家 ----------------
+void drawKid(Canvas c, PlayerView p, int t) {
+  final x = p.x.roundToDouble(), y = p.y.roundToDouble();
+  final w = p.w, h = p.h;
+  final air = !p.grounded;
+  c.save();
+  c.translate(x, y);
+  // 身体（红衣）
+  px(c, 2, 7, w - 4, 7, C.kid);
+  px(c, 2, 7, w - 4, 1, shade(C.kid, 40));
+  if (air) {
+    px(c, p.facing > 0 ? w - 3 : 0, 5, 3, 5, C.skin);
+  } else {
+    px(c, p.facing > 0 ? w - 3 : 0, 9, 3, 5, C.skin);
+  }
+  if (air) {
+    px(c, 3, 14, 4, 4, C.pant);
+    px(c, w - 7, 14, 4, 3, C.pant);
+  } else {
+    px(c, 2, 14, 4, 4, C.pant);
+    px(c, w - 6, 14, 4, 4, C.pant);
+  }
+  px(c, 1, 0, w - 2, 8, C.skin);
+  px(c, 1, 0, w - 2, 3, C.hair);
+  px(c, p.facing > 0 ? w - 5 : 3, 1, 3, 2, C.hair);
+  px(c, p.facing > 0 ? w - 6 : 3, 4, 2, 2, const Color(0xff101018));
+  px(c, p.facing > 0 ? w - 3 : 0, 4, 1, 2, const Color(0xff101018));
+  c.restore();
+
+  if (p.hasGun && !p.dead) {
+    final gx = p.facing > 0 ? x + w - 1 : x - 7;
+    final gy = y + 9;
+    px(c, gx, gy, 8, 3, C.gun);
+    px(c, p.facing > 0 ? gx + 6 : gx, gy + 1, 3, 2, const Color(0xff7a7a8c));
+    px(c, gx + 1, gy + 3, 3, 3, const Color(0xff6a6a7c));
+  }
+}
+
+// ---------------- 实体 ----------------
+void drawSave(Canvas c, EntityView e, int t) {
+  final cx = e.x + e.w / 2, cy = e.y + e.h / 2;
+  final on = e.active;
+  final pulse = 1 + sin(t / 180) * 0.09;
+  if (on) {
+    final p = Paint()..color = rgba(176, 107, 255, 0.28);
+    c.drawCircle(Offset(cx, cy), 15 * pulse, p);
+  } else {
+    final r = 13 + sin(t / 26) * 2.2;
+    final sp = Paint()
+      ..color = rgba(138, 106, 184, 0.30 + sin(t / 26) * 0.12)
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 1.5;
+    c.drawCircle(Offset(cx, cy), r, sp);
+  }
+  final col = on ? C.save : const Color(0xff8f74b5);
+  final p = Paint()..color = col;
+  c.drawCircle(Offset(cx - 3, cy - 1), 4.2, p);
+  c.drawCircle(Offset(cx + 4, cy + 1), 4.2, p);
+  c.drawCircle(Offset(cx, cy + 5), 4.2, p);
+  c.drawCircle(Offset(cx + 1, cy - 5), 4.2, p);
+  if (on) {
+    c.drawCircle(Offset(cx - 1, cy - 2), 1.6, Paint()..color = const Color(0xffe5d0ff));
+  }
+  px(c, cx + 1, cy - 9, 2, 4, const Color(0xff4a8a3a));
+}
+
+void drawGoal(Canvas c, EntityView e, int t) {
+  final x = e.x, y = e.y, w = e.w, h = e.h;
+  px(c, x + 3, y + 2, w - 6, h - 2, const Color(0xff2a1e3a));
+  px(c, x + 5, y + 4, w - 10, h - 6, const Color(0xff140d20));
+  final gr = Rect.fromLTWH(x + 5, y + 4, w - 10, h - 6);
+  final g = LinearGradient(
+    begin: _gradAlign(Offset(x, y + h), gr), end: _gradAlign(Offset(x, y), gr),
+    colors: [rgba(255, 200, 60, 0.55), rgba(255, 200, 60, 0)],
+  );
+  c.drawRect(gr, Paint()..shader = g.createShader(gr));
+  for (int i = 0; i < 3; i++) {
+    final pp = (((t / 700) + i / 3) % 1);
+    px(c, x + 7 + ((i * 9) % (w - 12)), y + h - 4 - pp * (h - 8), 2, 2, C.goal);
+  }
+  px(c, x + 3, y + 2, w - 6, 2, C.goal);
+  px(c, x + 3, y + 2, 2, h - 2, const Color(0xffc99a1e));
+  px(c, x + w - 5, y + 2, 2, h - 2, const Color(0xffc99a1e));
+}
+
+void drawGun(Canvas c, EntityView e, int t) {
+  final x = e.x, y = e.y + sin(t / 250) * 2;
+  px(c, x + 2, y + 6, 20, 7, const Color(0xff4a4a5c));
+  px(c, x + 2, y + 6, 20, 2, const Color(0xff8a8aa0));
+  px(c, x + 18, y + 8, 9, 3, C.gun);
+  px(c, x + 6, y + 13, 5, 8, const Color(0xff3a3a4c));
+  px(c, x + 8, y + 19, 3, 3, const Color(0xff2a2a3a));
+  px(c, x + 24, y + 7, 2, 5, const Color(0xffd0d0e0));
+}
+
+void drawApple(Canvas c, EntityView e, int t) {
+  final cx = e.x + e.w / 2, cy = e.y + e.h / 2 + sin(t / 320 + e.x) * 1.5;
+  c.drawCircle(Offset(cx, cy), 8, Paint()..color = C.apple);
+  c.drawCircle(Offset(cx - 3, cy - 3), 3, Paint()..color = const Color(0xffff8095));
+  px(c, cx - 1, cy - 11, 2, 4, const Color(0xff6b4423));
+  c.drawOval(Rect.fromLTWH(cx + 4 - 4, cy - 9 - 2, 8, 4), Paint()..color = const Color(0xff3ddc84));
+}
+
+void drawWarp(Canvas c, EntityView e, int t) {
+  final cx = e.x + e.w / 2, cy = e.y + e.h / 2;
+  for (int i = 0; i < 3; i++) {
+    final r = 14 - i * 4;
+    final a = t / (300 + i * 120);
+    final sp = Paint()
+      ..color = Color.fromARGB(((0.85 - i * 0.2) * 255).round().clamp(0, 255), (170 - i * 30).clamp(0, 255), (90 + i * 40).clamp(0, 255), 255)
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 2;
+    c.drawArc(Rect.fromLTWH(cx - r, cy - r, r * 2, r * 2), a, pi * 1.4, false, sp);
+  }
+  c.drawCircle(Offset(cx, cy), 5, Paint()..color = rgba(120, 60, 200, 0.35));
+}
+
+void drawCamera(Canvas c, EntityView e, int t) {
+  final x = e.x, y = e.y, w = e.w, h = e.h;
+  _dashedRect(c, Rect.fromLTWH(x + 1, y + 1, w - 2, h - 2),
+      rgba(80, 220, 255, 0.35 + sin(t / 300) * 0.15), 1, 4, 4);
+  final ix = x + w / 2 - 9, iy = y + 6;
+  px(c, ix, iy + 3, 18, 11, const Color(0xff1e1e2a));
+  px(c, ix + 2, iy + 5, 14, 7, const Color(0xff3a3a4c));
+  c.drawCircle(Offset(ix + 9, iy + 8.5), 3.5, Paint()..color = const Color(0xff7ae0ff));
+  px(c, ix + 12, iy, 5, 3, const Color(0xff1e1e2a));
+  px(c, ix + 13, iy - 1, 3, 2, const Color(0xffff4060));
+}
+
+void drawSign(Canvas c, EntityView e, int t) {
+  final x = e.x, y = e.y, w = e.w, h = e.h;
+  px(c, x + w / 2 - 1, y + h - 8, 3, 8, const Color(0xff6b4423));
+  px(c, x, y + 2, w, h - 10, const Color(0xffc9a86b));
+  px(c, x + 2, y + 4, w - 4, h - 14, const Color(0xffe8d5a8));
+  px(c, x + 4, y + 8, w - 8, 2, const Color(0xff8a7550));
+  px(c, x + 4, y + 13, w - 12, 2, const Color(0xff8a7550));
+}
+
+void drawTurret(Canvas c, EntityView e, int t) {
+  final x = e.x, y = e.y;
+  const s = TILE;
+  px(c, x + 2, y + 6, s - 4, s - 6, const Color(0xff4a4a5e));
+  px(c, x + 4, y + 8, s - 8, s - 12, const Color(0xff6a6a80));
+  final dirx = e.dir == 'left' ? -1 : e.dir == 'right' ? 1 : 0;
+  final diry = e.dir == 'up' ? -1 : e.dir == 'down' ? 1 : 0;
+  final cx = x + s / 2, cy = y + s / 2;
+  px(c, cx + dirx * 8 - 3, cy + diry * 8 - 3, 7, 7, const Color(0xff2a2a38));
+  final blink = (t ~/ 300) % 3 == 0;
+  px(c, cx + dirx * 12 - 2, cy + diry * 12 - 2, 4, 4, blink ? const Color(0xffff4060) : const Color(0xff8a2030));
+}
+
+void drawMovingPlatform(Canvas c, MoverView m) {
+  final x = m.x, y = m.y, w = m.w, h = m.h;
+  px(c, x, y, w, h, const Color(0xff3a3a4c));
+  px(c, x + 1, y + 1, w - 2, h - 2, const Color(0xff6a6a84));
+  px(c, x + 1, y + 1, w - 2, 2, const Color(0xff9a9ab4));
+  for (double i = 0; i < w; i += 8) px(c, x + i + 2, y + h - 4, 4, 2, const Color(0xff3a3a4c));
+  _dashedLine(c, Offset(m.ax + m.aw / 2, m.ay + m.ah / 2), Offset(m.bx + m.aw / 2, m.by + m.ah / 2),
+      rgba(255, 255, 255, 0.10), 1, 3, 5);
+}
+
+void drawDropSpike(Canvas c, EntityView e, int t) {
+  const s = TILE;
+  if (!e.falling) {
+    px(c, e.x + 4, e.y + 4, s - 8, s - 8, rgba(74, 74, 92, 0.85));
+    px(c, e.x + 6, e.y + 6, s - 12, s - 12, rgba(106, 106, 128, 0.85));
+  } else {
+    drawSpike(c, e.x, e.y, 2, t);
+  }
+}
+
+void drawBullet(Canvas c, BulletView b) {
+  px(c, b.x - 1, b.y - 1, b.w + 2, b.h + 2, rgba(255, 240, 120, 0.35));
+  px(c, b.x, b.y, b.w, b.h, const Color(0xfffff6a0));
+  px(c, b.x, b.y + b.h - 2, b.w, 2, const Color(0xffffb040));
+}
+
+void drawEBullet(Canvas c, BulletView b, int t) {
+  final cx = b.x + b.w / 2, cy = b.y + b.h / 2;
+  c.drawCircle(Offset(cx, cy), b.w / 2 + 1, Paint()..color = hex(b.col));
+  c.drawCircle(Offset(cx - 1.5, cy - 1.5), b.w / 4, Paint()..color = const Color(0xffffffff));
+  if (b.big) {
+    final sp = Paint()
+      ..color = rgba(255, 255, 255, 0.4)
+      ..style = PaintingStyle.stroke;
+    c.drawCircle(Offset(cx, cy), b.w / 2 + 4 + sin(t / 90) * 2, sp);
+  }
+}
+
+// ---------------- 死亡特效 ----------------
+void drawDeathRing(Canvas c, DeathFX fx) {
+  final t = fx.t;
+  if (t > 14) return;
+  final r = 4 + t * 1.8;
+  final a = max(0.0, 1 - t / 14);
+  final sp = Paint()
+    ..color = rgba(255, 143, 163, a * 0.85)
+    ..style = PaintingStyle.stroke
+    ..strokeWidth = 2;
+  c.drawCircle(Offset(fx.x, fx.y), r, sp);
+  c.drawCircle(Offset(fx.x, fx.y), r * 0.55, Paint()..color = rgba(255, 92, 122, a * 0.3));
+}
+
+void drawDeathMark(Canvas c, DeathMark dm) {
+  const s = 4.0;
+  final sp = Paint()
+    ..color = rgba(0, 0, 0, 0.55)
+    ..style = PaintingStyle.stroke
+    ..strokeWidth = 3
+    ..strokeCap = StrokeCap.round;
+  _line(c, sp, dm.x - s, dm.y - s, dm.x + s, dm.y + s);
+  _line(c, sp, dm.x + s, dm.y - s, dm.x - s, dm.y + s);
+  final sp2 = Paint()
+    ..color = const Color(0xffff2535)
+    ..style = PaintingStyle.stroke
+    ..strokeWidth = 2
+    ..strokeCap = StrokeCap.round;
+  _line(c, sp2, dm.x - s, dm.y - s, dm.x + s, dm.y + s);
+  _line(c, sp2, dm.x + s, dm.y - s, dm.x - s, dm.y + s);
+}
+
+// ---------------- 文本 ----------------
+void drawText(Canvas c, String text, double x, double y,
+    {Color color = const Color(0xffffffff), double size = 11, TextAlign align = TextAlign.center}) {
+  final tp = TextPainter(
+    text: TextSpan(text: text, style: TextStyle(color: color, fontSize: size, fontFamily: 'Courier')),
+    textAlign: align,
+    textDirection: TextDirection.ltr,
+  );
+  tp.layout();
+  tp.paint(c, Offset(x - (align == TextAlign.center ? tp.width / 2 : 0), y));
+}
+
+// ---------------- 虚线辅助 ----------------
+void _dashedLine(Canvas c, Offset a, Offset b, Color col, double width, double dash, double gap) {
+  final p = Paint()..color = col..strokeWidth = width;
+  final dx = b.dx - a.dx, dy = b.dy - a.dy;
+  final dist = sqrt(dx * dx + dy * dy);
+  if (dist == 0) return;
+  final ux = dx / dist, uy = dy / dist;
+  double d = 0;
+  while (d < dist) {
+    final d2 = min(d + dash, dist);
+    c.drawLine(Offset(a.dx + ux * d, a.dy + uy * d), Offset(a.dx + ux * d2, a.dy + uy * d2), p);
+    d += dash + gap;
+  }
+}
+
+void _dashedRect(Canvas c, Rect r, Color col, double width, double dash, double gap) {
+  _dashedLine(c, r.topLeft, r.topRight, col, width, dash, gap);
+  _dashedLine(c, r.topRight, r.bottomRight, col, width, dash, gap);
+  _dashedLine(c, r.bottomRight, r.bottomLeft, col, width, dash, gap);
+  _dashedLine(c, r.bottomLeft, r.topLeft, col, width, dash, gap);
+}
+
+void _line(Canvas c, Paint p, double x1, double y1, double x2, double y2) {
+  c.drawLine(Offset(x1, y1), Offset(x2, y2), p);
+}
+
+// 把像素空间的绝对 Offset 换算成 Flutter LinearGradient 所需的 Alignment。
+Alignment _gradAlign(Offset abs, Rect r) =>
+    Alignment(((abs.dx - r.left) - r.width / 2) / (r.width / 2),
+              ((abs.dy - r.top) - r.height / 2) / (r.height / 2));
diff --git a/app/lib/src/game/views.dart b/app/lib/src/game/views.dart
new file mode 100644
index 0000000..55a75bd
--- /dev/null
+++ b/app/lib/src/game/views.dart
@@ -0,0 +1,58 @@
+// 渲染层只读的"视图"接口：让 sprites.dart 不依赖完整游戏类，避免循环依赖。
+import 'dart:ui' show Color;
+
+abstract class PlayerView {
+  double get x;
+  double get y;
+  double get w;
+  double get h;
+  double get cx;
+  double get cy;
+  bool get grounded;
+  int get facing;
+  bool get hasGun;
+  bool get dead;
+}
+
+abstract class EntityView {
+  double get x;
+  double get y;
+  double get w;
+  double get h;
+  bool get active;
+  bool get falling;
+  String get dir;
+}
+
+abstract class MoverView {
+  double get x;
+  double get y;
+  double get w;
+  double get h;
+  double get ax;
+  double get ay;
+  double get aw;
+  double get ah;
+  double get bx;
+  double get by;
+}
+
+abstract class BulletView {
+  double get x;
+  double get y;
+  double get w;
+  double get h;
+  String get col;
+  bool get big;
+}
+
+class DeathFX {
+  double x, y;
+  int t;
+  DeathFX(this.x, this.y, this.t);
+}
+
+class DeathMark {
+  double x, y;
+  DeathMark(this.x, this.y);
+}
diff --git a/app/lib/src/game/world.dart b/app/lib/src/game/world.dart
new file mode 100644
index 0000000..9f5c13f
--- /dev/null
+++ b/app/lib/src/game/world.dart
@@ -0,0 +1,469 @@
+// 游戏循环 / 状态机（对应 web 版 main.js）。
+// 用固定 60Hz 时间步长驱动已移植的纯 Canvas 游戏逻辑，保证手感 1:1。
+// 渲染在 800×608 虚拟分辨率下完成，由 GameCanvas 做信箱（letterbox）缩放。
+import 'dart:ui' show Canvas, Color, Paint, Path, Rect, Offset, TextAlign, TextDirection;
+import 'dart:math' show sin;
+import 'package:flutter/widgets.dart'
+    show TextPainter, TextSpan, TextStyle, LinearGradient, Alignment, FontWeight, ValueNotifier;
+import 'package:iwbtc/src/core/input.dart';
+import 'package:iwbtc/src/core/save.dart';
+import 'package:iwbtc/src/core/util.dart';
+import 'package:iwbtc/src/audio/sfx.dart';
+import 'package:iwbtc/src/game/level.dart';
+import 'package:iwbtc/src/game/player.dart';
+import 'package:iwbtc/src/game/camera.dart';
+import 'package:iwbtc/src/game/levels.dart' show LEVELS;
+
+const double W = 800.0;
+const double H = 608.0;
+const double STEP = 1000 / 60;
+
+/// 编辑器试玩回调（避免 World <-> EditorController 循环依赖）。
+abstract class LevelTestRunner {
+  void startLevel(Map<String, dynamic> data, int idx);
+}
+
+/// 渲染宿主回调：World 通过它把界面状态推给 Flutter 层。
+abstract class GameHost {
+  /// 切换可见界面：''=游戏中，'scr-title'|'scr-levels'|'scr-settings'|
+  /// 'scr-pause'|'scr-result'|'scr-editor'。
+  void onShowScreen(String name);
+  void onHud(Map<String, dynamic> hud);
+  void onBossBar(dynamic boss);
+  void onToast(String text);
+  void onResult(Map<String, dynamic> r);
+  /// 暂停菜单「退出」按钮文案随来源变化。
+  void onPauseMenu(String label);
+  /// 进入编辑器界面。
+  void editorShow();
+  void touchShow();
+  void touchHide();
+  void touchSetGun(bool has);
+}
+
+class World implements LevelTestRunner {
+  final GameHost host;
+
+  /// 游戏状态：menu | playing | paused | result | editor
+  ///
+  /// 用 ValueNotifier 承载，是因为 Flutter 侧界面（HUD 显隐）必须能监听它重建：
+  /// 若只存普通字段，`startLevel()` 改完状态不会触发 AppRoot 重建，HUD 永远不出现。
+  /// （web 版由主循环每帧直接改 DOM，不存在这个问题。）
+  final ValueNotifier<String> stateN = ValueNotifier<String>('menu');
+
+  String get state => stateN.value;
+  set state(String v) {
+    if (stateN.value != v) stateN.value = v;
+  }
+
+  String screen = 'scr-title';
+  Level? level;
+  Player? player;
+  Camera? cam;
+  Map<String, dynamic>? data;
+  int idx = -1;
+  List<Level>? map;
+  int face = 0;
+  bool fromEditor = false;
+  int deaths = 0;
+  int ms = 0;
+  int hudTick = 0;
+  int time = 0;
+  String? lastLevelId;
+  bool useTouch = false;
+
+  double _acc = 0;
+  String _lastToast = '';
+
+  World(this.host);
+
+  // ---------------- 关卡流程 ----------------
+  Map<String, dynamic> faceData(Map<String, dynamic> map, Map<String, dynamic> f, int i) {
+    final grid = (f['grid'] as List?)?.cast<String>() ?? <String>[];
+    return <String, dynamic>{
+      'id': (map['id'] ?? 'map').toString() + '-' + i.toString(),
+      'name': f['name'] ?? ('面' + (i + 1).toString()),
+      'type': 'custom',
+      'width': f['width'] ?? (grid.isNotEmpty ? grid[0].length : 25),
+      'grid': f['grid'],
+      'doors': f['doors'] ?? <dynamic>[],
+      'bg': 'custom',
+      'hint': '',
+      'messages': <dynamic>[],
+    };
+  }
+
+  void startLevel(Map<String, dynamic> data, int idx) {
+    Sfx.instance.unlock();
+    this.data = data;
+    this.idx = idx;
+    lastLevelId = data['id']?.toString();
+
+    final faces = data['faces'];
+    if (faces is List && faces.isNotEmpty) {
+      map = <Level>[];
+      for (int i = 0; i < faces.length; i++) {
+        final L = Level(faceData(data, faces[i] as Map<String, dynamic>, i));
+        L.faceIndex = i;
+        map!.add(L);
+      }
+      face = ((data['startFace'] as int?) ?? 0).clamp(0, map!.length - 1);
+    } else {
+      map = <Level>[Level(data)];
+      face = 0;
+    }
+
+    level = map![face];
+    player = Player(level!);
+    cam = Camera(W, H);
+    cam!.reset(level!, player!);
+
+    player!.onDeath = () {
+      deaths++;
+    };
+    player!.onClear = () {
+      finish();
+    };
+    player!.onPortal = (e) {
+      doPortal(e as Entity);
+    };
+    player!.onRespawnFace = () {
+      doRespawnFace();
+    };
+    for (final b in level!.bosses) {
+      b.onDefeat = () {
+        finish();
+      };
+    }
+
+    deaths = 0;
+    ms = 0;
+    hudTick = 0;
+    state = 'playing';
+    host.onShowScreen('');
+    if (useTouch) host.touchShow();
+    host.onToast('');
+    final hint = data['hint'];
+    if (hint is String && hint.isNotEmpty) host.onToast(hint);
+  }
+
+  void placeOnDoor(Entity dest) {
+    final P = player!;
+    P.x = dest.x + dest.w / 2 - P.w / 2;
+    P.y = dest.y + dest.h - P.h;
+    P.vx = 0;
+    P.vy = 0;
+    P.jumps = 0;
+  }
+
+  void doPortal(Entity e) {
+    final to = e.to;
+    if (to is! Map) return;
+    final tp = (to['face'] as int? ?? face).clamp(0, map!.length - 1);
+    if (tp == face) {
+      final dest = level!.entities
+          .where((o) => o.type == 'warp' && o.doorId == to['door'])
+          .firstOrNull;
+      if (dest != null) {
+        placeOnDoor(dest);
+        dest.cool = 40;
+      }
+      Sfx.instance.warp();
+    } else {
+      switchFace(tp, to['door']);
+    }
+  }
+
+  void switchFace(int f, dynamic doorId) {
+    face = f;
+    level = map![f];
+    level!.reset(true);
+    player!.level = level!;
+    final dest = level!.entities
+        .where((o) => o.type == 'warp' && o.doorId == doorId)
+        .firstOrNull;
+    if (dest != null) {
+      placeOnDoor(dest);
+      dest.cool = 40;
+    } else {
+      final sp = level!.spawn;
+      player!.x = sp.x;
+      player!.y = sp.y;
+      player!.vx = 0;
+      player!.vy = 0;
+    }
+    cam!.reset(level!, player!);
+    Sfx.instance.warp();
+    level!.particles.spawn(player!.cx, player!.cy, 12,
+        colors: const ['#a86bff', '#fff'], speed: 2.5, life: 24);
+  }
+
+  void doRespawnFace() {
+    final sp = player!.savePoint;
+    if (sp != null && sp.face != face) {
+      face = sp.face;
+      level = map![face];
+      level!.reset(true);
+      player!.level = level!;
+      cam!.reset(level!, player!);
+    }
+  }
+
+  void restart() {
+    if (data == null) return;
+    final d = deaths;
+    startLevel(data!, idx);
+    deaths = d;
+  }
+
+  void suicide() {
+    final P = player;
+    if (P == null || state != 'playing') return;
+    if (P.dead) {
+      P.respawn();
+    } else {
+      P.deathBurst();
+      P.respawn();
+    }
+  }
+
+  void shoot() {
+    final P = player;
+    if (state != 'playing' || P == null || P.dead || !P.hasGun || P.shootCool != 0) return;
+    P.shoot();
+  }
+
+  void finish() {
+    if (state != 'playing') return;
+    state = 'result';
+    host.touchHide();
+    Sfx.instance.goal();
+    final apples = player!.apples;
+    final total = level!.totalApples;
+    final better = Save.clear(data!['id'].toString(), deaths, ms, apples);
+    final hasNext = idx >= 0 && idx + 1 < LEVELS.length;
+    host.onResult(<String, dynamic>{
+      'name': data!['name'],
+      'ms': ms,
+      'deaths': deaths,
+      'apples': apples,
+      'totalApples': total,
+      'better': better,
+      'hasNext': hasNext,
+    });
+    host.onShowScreen('scr-result');
+  }
+
+  void nextLevel() {
+    if (idx >= 0 && idx + 1 < LEVELS.length) {
+      startLevel(LEVELS[idx + 1], idx + 1);
+    } else {
+      toLevels();
+    }
+  }
+
+  void toLevels() {
+    state = 'menu';
+    screen = 'scr-levels';
+    host.onShowScreen('scr-levels');
+    host.touchHide();
+  }
+
+  void toTitle() {
+    state = 'menu';
+    screen = 'scr-title';
+    host.onShowScreen('scr-title');
+    host.touchHide();
+  }
+
+  void toEditor() {
+    state = 'editor';
+    screen = 'scr-editor';
+    host.onShowScreen('scr-editor');
+    host.touchHide();
+    host.editorShow();
+  }
+
+  void pause() {
+    if (state != 'playing') return;
+    state = 'paused';
+    // 暂停菜单末项：从编辑器试玩进来 → 「返回编辑器」；否则 → 「返回关卡选择」
+    host.onPauseMenu(fromEditor ? '返回编辑器' : '返回关卡选择');
+    host.onShowScreen('scr-pause');
+    host.touchHide();
+  }
+
+  void resume() {
+    if (state == 'paused') {
+      state = 'playing';
+      host.onShowScreen('');
+      if (useTouch) host.touchShow();
+    }
+  }
+
+  // ---------------- 更新 ----------------
+  void update() {
+    final P = player!;
+    if (Input.hit('suicide')) {
+      suicide();
+      return;
+    }
+    if (Input.hit('restart')) {
+      restart();
+      return;
+    }
+    if (Input.hit('pause')) {
+      pause();
+      return;
+    }
+
+    level!.update(1, P, cam!);
+    for (final b in level!.bosses) b.update(1, P);
+    P.update(1);
+
+    if (P.justRespawned) {
+      if (P.savePoint != null && P.savePoint!.face != face) doRespawnFace();
+      cam!.snapTo(P, level!);
+      P.justRespawned = false;
+    }
+
+    cam!.update(level!, P, 1);
+    ms += STEP.round();
+    time++;
+
+    if (++hudTick % 5 == 0) {
+      final L = level!;
+      host.onHud(<String, dynamic>{
+        'name': (data!['name'] ?? 'STAGE') +
+            (map!.length > 1 ? ' · 面${face + 1}/${map!.length}' : ''),
+        'deaths': deaths,
+        'ms': ms,
+        'apples': P.apples,
+        'totalApples': L.totalApples,
+        'hasGun': P.hasGun,
+        'save': P.saveIdx,
+        'totalSaves': L.totalSaves,
+      });
+      host.touchSetGun(P.hasGun);
+      final boss = L.bosses.where((b) => !b.dead).firstOrNull ?? L.bosses.firstOrNull;
+      host.onBossBar(L.bosses.isNotEmpty ? boss : null);
+      _pushToast(L.toast ?? '');
+    }
+  }
+
+  void _pushToast(String t) {
+    if (t != _lastToast) {
+      _lastToast = t;
+      host.onToast(t);
+    }
+  }
+
+  // ---------------- 循环驱动（由 Ticker 调用） ----------------
+  void tick(int dtMs) {
+    int dt = dtMs;
+    if (dt > 200) dt = 200;
+    _acc += dt;
+    int guard = 0;
+    while (_acc >= STEP && guard++ < 6) {
+      _acc -= STEP;
+      if (state == 'playing') {
+        update();
+      } else if (state == 'paused' && Input.hit('pause')) {
+        resume();
+      }
+    }
+    Input.endFrame();
+    // toast 推送必须在 Ticker 回调阶段（transientCallbacks）完成，
+    // 不能放进 render() —— paint 阶段改被 ValueListenableBuilder 监听的
+    // notifier 会触发 "Build scheduled during frame"（晚一帧且刷警告）。
+    _pushToast(level?.toast ?? '');
+    if (state != 'playing') time++;
+  }
+
+  // ---------------- 渲染（800×608 虚拟空间） ----------------
+  void render(Canvas c) {
+    final t = time;
+    if (state == 'playing' || state == 'paused' || state == 'result') {
+      final L = level!;
+      final P = player!;
+      final C = cam!;
+      c.drawRect(Rect.fromLTWH(0, 0, W, H), Paint()..color = hex('#0a0a14'));
+      L.drawBg(c, C, t);
+      c.save();
+      C.apply(c);
+      L.draw(c, C, t);
+      for (final b in L.bosses) b.draw(c, t);
+      P.draw(c);
+      c.restore();
+      L.drawOverlay(c, C, t);
+
+      // 死亡中：提示手动重生
+      if (state == 'playing' && P.dead) {
+        final blink = sin(t / 12) > -0.3;
+        final tp = TextPainter(
+          text: TextSpan(
+            text: useTouch ? '按右下角重生键' : '按 R 重生',
+            style: TextStyle(
+              color: const Color(0xffff8fa3).withValues(alpha: (blink ? 1.0 : 0.3) * 255),
+              fontSize: 20,
+              fontWeight: FontWeight.bold,
+              fontFamily: 'monospace',
+            ),
+          ),
+          textAlign: TextAlign.center,
+          textDirection: TextDirection.ltr,
+        );
+        tp.layout();
+        tp.paint(c, Offset(W / 2 - tp.width / 2, H / 2 - 36 - tp.height / 2));
+        final sub = TextPainter(
+          text: TextSpan(
+            text: 'Backspace 整关重来',
+            style: TextStyle(
+              color: const Color(0xffa8a8c0).withValues(alpha: 0.7 * 255),
+              fontSize: 12,
+              fontFamily: 'monospace',
+            ),
+          ),
+          textAlign: TextAlign.center,
+          textDirection: TextDirection.ltr,
+        );
+        sub.layout();
+        sub.paint(c, Offset(W / 2 - sub.width / 2, H / 2 - 12 - sub.height / 2));
+      }
+    } else {
+      drawTitleBg(c);
+    }
+  }
+
+  void drawTitleBg(Canvas c) {
+    final g = LinearGradient(
+      begin: Alignment.topCenter,
+      end: Alignment.bottomCenter,
+      colors: <Color>[hex('#181828'), hex('#08080f')],
+    ).createShader(Rect.fromLTWH(0, 0, W, H));
+    c.drawRect(Rect.fromLTWH(0, 0, W, H), Paint()..shader = g);
+
+    for (int i = 0; i < 26; i++) {
+      final double x = ((i * 137 + time * 0.15) % (W + 60)) - 30;
+      final double y = 120 + ((i * 71) % (H - 160)).toDouble();
+      final col = i % 3 == 0 ? hex('#3a3a4c') : hex('#2a2a38');
+      final p = Path()
+        ..moveTo(x, y + 18)
+        ..lineTo(x + 11, y)
+        ..lineTo(x + 22, y + 18)
+        ..close();
+      c.drawPath(p, Paint()..color = col.withValues(alpha: 0.5 * 255));
+    }
+
+    c.drawRect(Rect.fromLTWH(0, H - 30, W, 30), Paint()..color = hex('#1a1a26'));
+    final spikePaint = Paint()..color = hex('#c8c8d8');
+    for (double x = 0; x < W; x += 22) {
+      final p = Path()
+        ..moveTo(x, H - 4)
+        ..lineTo(x + 11, H - 26)
+        ..lineTo(x + 22, H - 4)
+        ..close();
+      c.drawPath(p, spikePaint);
+    }
+  }
+}
diff --git a/app/lib/src/ui/editor_panel.dart b/app/lib/src/ui/editor_panel.dart
new file mode 100644
index 0000000..71683fe
--- /dev/null
+++ b/app/lib/src/ui/editor_panel.dart
@@ -0,0 +1,1153 @@
+// 自制关卡编辑器（对应 web 版 editor.js）：多面地图 + 可变宽高 + 属性面板。
+import 'dart:ui' show Canvas;
+import 'package:flutter/material.dart';
+import 'package:iwbtc/src/core/util.dart' show TILE;
+import 'package:iwbtc/src/core/save.dart' show Save;
+import 'package:iwbtc/src/game/levels.dart' show makeCustomLevel, LEVELS;
+import 'package:iwbtc/src/game/sprites.dart' as S;
+import 'package:iwbtc/src/game/views.dart' show PlayerView, EntityView;
+import 'package:iwbtc/src/game/world.dart' show LevelTestRunner;
+
+const List<List<String>> PALETTE = <List<String>>[
+  <String>['#', '方块', '#6b6b7e'],
+  <String>['@', '草地', '#4f9e46'],
+  <String>['=', '砖块', '#a8543c'],
+  <String>['M', '金属', '#5a6478'],
+  <String>['%', '冰面', '#8fd8f0'],
+  <String>['~', '水', '#2a6fd8'],
+  <String>['-', '单向台', '#9aa6bd'],
+  <String>['V', '消失块', '#7a7a8c'],
+  <String>['^', '刺', '#c8c8d8'],
+  <String>['*', '美味水果', '#e03050'],
+  <String>['S', '出生点', '#3ddc84'],
+  <String>['G', '存档点', '#b06bff'],
+  <String>['X', '终点', '#ffc63a'],
+  <String>['P', '手枪', '#b8b8c8'],
+  <String>['F', '苹果', '#ff8095'],
+  <String>['J', '跳刷新', '#3ddc84'],
+  <String>['W', '传送门', '#a86bff'],
+  <String>['T', '提示牌', '#c9a86b'],
+  <String>['O', '炮台', '#6a6a80'],
+  <String>['D', '掉落刺', '#8a5a6a'],
+  <String>['C', '摄像头', '#7ae0ff'],
+  <String>['B', 'BOSS', '#ff5c7a'],
+  <String>['!', '触发器', '#ff9a3a'],
+  <String>['.', '橡皮', '#20202c'],
+];
+
+const Map<String, List<Map<String, dynamic>>> SCHEMA = <String, List<Map<String, dynamic>>>{
+  '^': <Map<String, dynamic>>[
+    <String, dynamic>{'type': 'select', 'key': 'dir', 'label': '方向', 'def': 'up', 'opts': <List<String>>[<String>['up', '上'], <String>['down', '下'], <String>['left', '左'], <String>['right', '右']]}
+  ],
+  'W': <Map<String, dynamic>>[],
+  'T': <Map<String, dynamic>>[
+    <String, dynamic>{'type': 'text', 'key': 'msg', 'label': '提示文字', 'placeholder': '这块牌子显示的话'}
+  ],
+  'O': <Map<String, dynamic>>[
+    <String, dynamic>{'type': 'select', 'key': 'dir', 'label': '朝向', 'opts': <List<String>>[<String>['left', '左'], <String>['right', '右'], <String>['up', '上'], <String>['down', '下']]},
+    <String, dynamic>{'type': 'num', 'key': 'period', 'label': '发射间隔(帧)', 'min': 10, 'max': 600, 'def': 90},
+    <String, dynamic>{'type': 'num', 'key': 'speed', 'label': '子弹速度', 'min': 0.5, 'max': 10, 'step': 0.1, 'def': 2.4},
+    <String, dynamic>{'type': 'num', 'key': 'offset', 'label': '初始延迟(帧)', 'min': 0, 'max': 600, 'def': 0},
+  ],
+  'C': <Map<String, dynamic>>[
+    <String, dynamic>{'type': 'num', 'key': 'w', 'label': '区域宽(格)', 'min': 1, 'max': 40, 'def': 3},
+    <String, dynamic>{'type': 'num', 'key': 'h', 'label': '区域高(格)', 'min': 1, 'max': 40, 'def': 3},
+    <String, dynamic>{'type': 'select', 'key': 'mode', 'label': '镜头模式', 'opts': <List<String>>[<String>['lock', '锁定'], <String>['zoom', '缩放'], <String>['follow-off', '跟随关闭']]},
+    <String, dynamic>{'type': 'num', 'key': 'zoom', 'label': '缩放倍数', 'min': 0.3, 'max': 3, 'step': 0.1, 'def': 1},
+  ],
+  'B': <Map<String, dynamic>>[
+    <String, dynamic>{'type': 'select', 'key': 'kind', 'label': 'BOSS 类型', 'opts': <List<String>>[<String>['guy', '小兵'], <String>['mecha', '机甲']]},
+    <String, dynamic>{'type': 'num', 'key': 'hp', 'label': '血量', 'min': 1, 'max': 999, 'def': 40},
+  ],
+};
+
+const Map<String, String> SPIKE_CHAR = <String, String>{'up': '^', 'down': 'v', 'left': '<', 'right': '>'};
+const Map<String, String> SPIKE_DIR = <String, String>{'^': 'up', 'v': 'down', '<': 'left', '>': 'right'};
+
+class EditFace {
+  String name;
+  int w;
+  int h;
+  int seq;
+  List<List<String>> grid;
+  List<List<Map<String, dynamic>?>> props;
+  List<Map<String, dynamic>> doors;
+  EditFace(
+      {required this.name,
+      required this.w,
+      required this.h,
+      required this.seq,
+      required this.grid,
+      required this.props,
+      required this.doors});
+}
+
+class _Ent implements EntityView {
+  @override
+  double x, y, w, h;
+  @override
+  bool active;
+  @override
+  bool falling;
+  @override
+  String dir;
+  _Ent({required this.x, required this.y, required this.w, required this.h,
+      this.active = false, this.falling = false, this.dir = 'left'});
+}
+
+class _KidView implements PlayerView {
+  @override
+  double x, y, w, h;
+  @override
+  int facing;
+  @override
+  bool grounded, hasGun, dead;
+  _KidView({required this.x, required this.y, required this.w, required this.h,
+      this.facing = 1, this.grounded = true, this.hasGun = false, this.dead = false});
+  @override
+  double get cx => x + w / 2;
+  @override
+  double get cy => y + h / 2;
+}
+
+class EditorController {
+  List<EditFace> faces = <EditFace>[];
+  int face = 0;
+  String sel = '#';
+  int? selTx, selTy;
+  String? curId;
+  VoidCallback? onChange;
+  LevelTestRunner? runner;
+
+  bool get active => faces.isNotEmpty;
+
+  void showOrOpen() {
+    if (faces.isEmpty) {
+      open(25, 19);
+    } else {
+      onChange?.call();
+    }
+  }
+
+  void open(int w, int h) {
+    w = clampInt(w, 12, 160);
+    h = clampInt(h, 8, 80);
+    faces = <EditFace>[
+      EditFace(
+        name: '面1',
+        w: w,
+        h: h,
+        seq: 0,
+        grid: blank(w, h),
+        props: propsBlank(w, h),
+        doors: <Map<String, dynamic>>[],
+      )
+    ];
+    face = 0;
+    curId = null;
+    selTx = selTy = null;
+    onChange?.call();
+  }
+
+  EditFace cur() => faces[face];
+
+  void resize(int w, int h) {
+    w = clampInt(w, 12, 160);
+    h = clampInt(h, 8, 80);
+    final f = cur();
+    final og = f.grid;
+    final op = f.props;
+    f.grid = blank(w, h);
+    f.props = propsBlank(w, h);
+    for (int y = 0; y < h; y++) {
+      for (int x = 0; x < w; x++) {
+        if (y < og.length && x < og[y].length) f.grid[y][x] = og[y][x];
+        if (y < op.length && x < op[y].length) f.props[y][x] = op[y][x];
+      }
+    }
+    f.doors = f.doors.where((d) => d['tx'] < w && d['ty'] < h).toList();
+    f.w = w;
+    f.h = h;
+    selTx = selTy = null;
+    onChange?.call();
+  }
+
+  void fillBottom() {
+    final f = cur();
+    for (int x = 0; x < f.w; x++) f.grid[f.h - 1][x] = '#';
+    onChange?.call();
+  }
+
+  void clearFace() {
+    final f = cur();
+    f.grid = blank(f.w, f.h);
+    f.props = propsBlank(f.w, f.h);
+    f.doors = <Map<String, dynamic>>[];
+    selTx = selTy = null;
+    onChange?.call();
+  }
+
+  void addFace() {
+    final f = cur();
+    faces.add(EditFace(
+      name: '面${faces.length + 1}',
+      w: f.w,
+      h: f.h,
+      seq: 0,
+      grid: blank(f.w, f.h),
+      props: propsBlank(f.w, f.h),
+      doors: <Map<String, dynamic>>[],
+    ));
+    face = faces.length - 1;
+    selTx = selTy = null;
+    onChange?.call();
+  }
+
+  void copyFace() {
+    final f = cur();
+    faces.add(EditFace(
+      name: f.name + ' 副本',
+      w: f.w,
+      h: f.h,
+      seq: f.seq,
+      grid: f.grid.map((r) => List<String>.from(r)).toList(),
+      props: f.props.map((r) => r.map((c) => c == null ? null : Map<String, dynamic>.from(c)).toList()).toList(),
+      doors: f.doors.map((d) => Map<String, dynamic>.from(d)).toList(),
+    ));
+    face = faces.length - 1;
+    selTx = selTy = null;
+    onChange?.call();
+  }
+
+  void delFace() {
+    if (faces.length <= 1) return;
+    faces.removeAt(face);
+    face = (face - 1).clamp(0, faces.length - 1);
+    selTx = selTy = null;
+    onChange?.call();
+  }
+
+  void paintTile(int tx, int ty, bool erase) {
+    final f = cur();
+    if (tx < 0 || ty < 0 || tx >= f.w || ty >= f.h) return;
+    selTx = tx;
+    selTy = ty;
+    final prev = f.grid[ty][tx];
+    final ch = erase ? '.' : (sel == '.' ? '.' : sel);
+    if (!erase && ch != '.' && prev != '.') {
+      onChange?.call();
+      return;
+    }
+    if (prev == 'W' && ch != 'W') removeDoor(f, tx, ty);
+    if (ch == 'W' && prev != 'W') {
+      f.seq++;
+      f.doors.add(<String, dynamic>{'id': f.seq, 'tx': tx, 'ty': ty, 'to': null});
+    }
+    if (prev != ch) f.props[ty][tx] = null;
+    f.grid[ty][tx] = ch;
+    onChange?.call();
+  }
+
+  void removeDoor(EditFace f, int tx, int ty) {
+    f.doors.removeWhere((d) => d['tx'] == tx && d['ty'] == ty);
+  }
+
+  Map<String, dynamic>? propAt(int tx, int ty) {
+    if (tx < 0 || ty < 0 || tx >= cur().w || ty >= cur().h) return null;
+    return cur().props[ty][tx];
+  }
+
+  void setProp(int tx, int ty, String key, dynamic value) {
+    final f = cur();
+    f.props[ty][tx] ??= <String, dynamic>{};
+    f.props[ty][tx]![key] = value;
+    onChange?.call();
+  }
+
+  void setPropFaceDoor(EditFace f, int tx, int ty, int face, int door) {
+    final d = f.doors.firstWhere((o) => o['tx'] == tx && o['ty'] == ty,
+        orElse: () => <String, dynamic>{});
+    if (d.isEmpty) return;
+    d['to'] = door >= 0 ? <String, dynamic>{'face': face, 'door': door} : null;
+    onChange?.call();
+  }
+
+  Map<String, dynamic> buildData() {
+    final facesData = faces.map((f) {
+      final grid = f.grid.map((r) {
+        return r.map((ch) {
+          if (ch == '^') {
+            final dir = (f.props[f.grid.indexOf(r)]?[r.indexOf(ch)] ?? {})['dir'] ?? 'up';
+            return SPIKE_CHAR[dir] ?? '^';
+          }
+          return ch;
+        }).join('');
+      }).toList();
+      final messages = <String>[];
+      final turrets = <Map<String, dynamic>>[];
+      final camzones = <Map<String, dynamic>>[];
+      final bosses = <Map<String, dynamic>>[];
+      for (int y = 0; y < f.h; y++) {
+        for (int x = 0; x < f.w; x++) {
+          final ch = f.grid[y][x];
+          final p = f.props[y][x];
+          if (ch == 'T' && p != null && (p['msg'] ?? '').isNotEmpty) messages.add(p['msg']);
+          if (ch == 'O' && p != null) {
+            turrets.add(<String, dynamic>{
+              'dir': p['dir'] ?? 'left',
+              'period': (p['period'] ?? 90).toInt(),
+              'speed': (p['speed'] ?? 2.4).toDouble(),
+              'offset': (p['offset'] ?? 0).toInt(),
+              'kind': p['kind'] ?? 'ball',
+            });
+          }
+          if (ch == 'C' && p != null) {
+            camzones.add(<String, dynamic>{
+              'w': (p['w'] ?? 3).toInt(),
+              'h': (p['h'] ?? 3).toInt(),
+              'mode': p['mode'] ?? 'lock',
+              'zoom': (p['zoom'] ?? 1).toDouble(),
+            });
+          }
+          if (ch == 'B' && p != null) {
+            bosses.add(<String, dynamic>{
+              'kind': p['kind'] ?? 'guy',
+              'hp': (p['hp'] ?? 40).toInt(),
+            });
+          }
+        }
+      }
+      return <String, dynamic>{
+        'name': f.name,
+        'width': f.w,
+        'height': f.h,
+        'grid': grid,
+        'doors': f.doors
+            .map((d) => <String, dynamic>{
+                  'id': d['id'],
+                  'tx': d['tx'],
+                  'ty': d['ty'],
+                  'to': d['to'],
+                })
+            .toList(),
+        'messages': messages,
+        'turrets': turrets,
+        'camzones': camzones,
+        'bosses': bosses,
+      };
+    }).toList();
+    return <String, dynamic>{
+      'name': 'MY MAP',
+      'type': 'custom',
+      'startFace': 0,
+      'faces': facesData,
+    };
+  }
+
+  String? validate() {
+    for (int i = 0; i < faces.length; i++) {
+      final g = faces[i].grid;
+      int s = 0, x = 0;
+      for (final row in g) {
+        s += row.where((c) => c == 'S').length;
+        x += row.where((c) => c == 'X').length;
+      }
+      if (s != 1) return '面${i + 1}（${faces[i].name}）必须且只能有 1 个 S，当前 $s 个';
+      if (x < 1) return '面${i + 1}（${faces[i].name}）至少要 1 个 X（终点）';
+    }
+    for (int i = 0; i < faces.length; i++) {
+      for (final d in faces[i].doors) {
+        final to = d['to'];
+        if (to is Map && to['face'] == i && to['door'] == d['id']) {
+          return '面${i + 1} 的门${d['id']} 不能指向自己';
+        }
+      }
+    }
+    return null;
+  }
+
+  void test() {
+    final err = validate();
+    if (err != null) {
+      lastError = err;
+      onChange?.call();
+      return;
+    }
+    lastError = null;
+    runner?.startLevel(makeCustomLevel(buildData()), -1);
+  }
+
+  String? lastError;
+
+  void save() {
+    final err = validate();
+    if (err != null) {
+      lastError = err;
+      onChange?.call();
+      return;
+    }
+    lastError = null;
+    Map<String, dynamic> lv = makeCustomLevel(buildData());
+    if (curId != null) lv['id'] = curId;
+    Save.updateCustom(lv);
+    curId = lv['id'] as String;
+    onChange?.call();
+  }
+
+  void pickImport(String id) {
+    final l = Save.customs().cast<Map<String, dynamic>>().firstWhere(
+        (c) => c['id'] == id,
+        orElse: () => <String, dynamic>{});
+    if (l.isEmpty) return;
+    curId = id;
+    hydrate(l);
+    onChange?.call();
+  }
+
+  void hydrate(Map<String, dynamic> o) {
+    final facesRaw = (o['faces'] as List?) ?? <dynamic>[];
+    faces = facesRaw.map((fr) {
+      final f = fr as Map<String, dynamic>;
+      final w = (f['width'] as int?) ?? ((f['grid'] as List).first as String).length;
+      final h = (f['height'] as int?) ?? (f['grid'] as List).length;
+      final grid = (f['grid'] as List).map((r) => (r as String).split('').toList()).toList();
+      final props = propsBlank(w, h);
+      final face = EditFace(
+        name: f['name'] ?? '面',
+        w: w,
+        h: h,
+        seq: (f['doors'] as List? ?? []).map((d) => (d as Map)['id'] as int).fold(0, (m, e) => m > e ? m : e),
+        grid: grid,
+        props: props,
+        doors: (f['doors'] as List? ?? [])
+            .map((d) => Map<String, dynamic>.from(d as Map))
+            .toList(),
+      );
+      int mi = 0, ti = 0, ci = 0, bi = 0;
+      for (int y = 0; y < h; y++) {
+        for (int x = 0; x < w; x++) {
+          final ch = grid[y][x];
+          if (ch == 'T') {
+            final m = (f['messages'] as List? ?? [])[mi++];
+            if (m != null) props[y][x] = <String, dynamic>{'msg': m};
+          } else if (ch == 'O') {
+            final t = (f['turrets'] as List? ?? [])[ti++];
+            if (t != null) props[y][x] = Map<String, dynamic>.from(t as Map);
+          } else if (ch == 'C') {
+            final c = (f['camzones'] as List? ?? [])[ci++];
+            if (c != null) props[y][x] = Map<String, dynamic>.from(c as Map);
+          } else if (ch == 'B') {
+            final b = (f['bosses'] as List? ?? [])[bi++];
+            if (b != null) props[y][x] = Map<String, dynamic>.from(b as Map);
+          } else if (SPIKE_DIR.containsKey(ch)) {
+            grid[y][x] = '^';
+            props[y][x] = <String, dynamic>{'dir': SPIKE_DIR[ch]};
+          }
+        }
+      }
+      return face;
+    }).toList();
+    face = 0;
+    selTx = selTy = null;
+  }
+}
+
+List<List<String>> blank(int w, int h) =>
+    List.generate(h, (_) => List<String>.filled(w, '.'));
+List<List<Map<String, dynamic>?>> propsBlank(int w, int h) =>
+    List.generate(h, (_) => List<Map<String, dynamic>?>.filled(w, null));
+int clampInt(int v, int a, int b) => v < a ? a : v > b ? b : v;
+
+// ---------------- 面板 ----------------
+class EditorPanel extends StatefulWidget {
+  final EditorController controller;
+  final VoidCallback onBack;
+  const EditorPanel(
+      {super.key, required this.controller, required this.onBack});
+
+  @override
+  State<EditorPanel> createState() => _EditorPanelState();
+}
+
+class _EditorPanelState extends State<EditorPanel> {
+  final TextEditingController _nameCtl = TextEditingController();
+  final TextEditingController _wCtl = TextEditingController();
+  final TextEditingController _hCtl = TextEditingController();
+  bool _importOpen = false;
+
+  @override
+  void initState() {
+    super.initState();
+    widget.controller.onChange = () => setState(() {});
+    _syncFields();
+  }
+
+  void _syncFields() {
+    if (widget.controller.active) {
+      _nameCtl.text = widget.controller.cur().name;
+      _wCtl.text = widget.controller.cur().w.toString();
+      _hCtl.text = widget.controller.cur().h.toString();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final c = widget.controller;
+    if (!c.active) {
+      return _MenuBg(
+        child: Center(
+          child: ElevatedButton(
+            onPressed: () {
+              c.open(25, 19);
+              _syncFields();
+            },
+            child: const Text('新建地图'),
+          ),
+        ),
+      );
+    }
+    _syncFields();
+    final f = c.cur();
+    return _MenuBg(
+      child: Column(
+        children: <Widget>[
+          Row(children: <Widget>[
+            const Text('自制关卡',
+                style: TextStyle(color: Color(0xffffffff), fontSize: 22)),
+            const Spacer(),
+            _SmallButton('返回', onPressed: widget.onBack),
+          ]),
+          const SizedBox(height: 8),
+          Row(children: <Widget>[
+            SizedBox(
+              width: 120,
+              child: TextField(
+                controller: _nameCtl,
+                onChanged: (v) => f.name = v,
+                style: const TextStyle(color: Color(0xffffffff)),
+                decoration: const InputDecoration(
+                  isCollapsed: true,
+                  contentPadding: EdgeInsets.all(6),
+                  border: OutlineInputBorder(),
+                  hintText: '地图名',
+                  hintStyle: TextStyle(color: Color(0xff55556a)),
+                ),
+              ),
+            ),
+            const SizedBox(width: 8),
+            const Text('宽', style: TextStyle(color: Color(0xffc8c8d8))),
+            SizedBox(
+              width: 48,
+              child: TextField(
+                controller: _wCtl,
+                keyboardType: TextInputType.number,
+                style: const TextStyle(color: Color(0xffffffff)),
+                decoration: const InputDecoration(
+                  isCollapsed: true,
+                  contentPadding: EdgeInsets.all(6),
+                  border: OutlineInputBorder(),
+                ),
+              ),
+            ),
+            const SizedBox(width: 8),
+            const Text('高', style: TextStyle(color: Color(0xffc8c8d8))),
+            SizedBox(
+              width: 48,
+              child: TextField(
+                controller: _hCtl,
+                keyboardType: TextInputType.number,
+                style: const TextStyle(color: Color(0xffffffff)),
+                decoration: const InputDecoration(
+                  isCollapsed: true,
+                  contentPadding: EdgeInsets.all(6),
+                  border: OutlineInputBorder(),
+                ),
+              ),
+            ),
+            _SmallButton('调整', onPressed: () {
+              c.resize(int.tryParse(_wCtl.text) ?? 25,
+                  int.tryParse(_hCtl.text) ?? 19);
+            }),
+            _SmallButton('铺底', onPressed: c.fillBottom),
+            _SmallButton('清空', onPressed: c.clearFace),
+            _SmallButton('导入', onPressed: () => setState(() => _importOpen = true)),
+            _SmallButton('试玩', onPressed: c.test),
+            _SmallButton('保存', on: true, onPressed: c.save),
+            Text(c.curId == null ? '→ 新地图' : '→ 已保存',
+                style: const TextStyle(color: Color(0xff8a8aa8), fontSize: 12)),
+          ]),
+          if (c.lastError != null)
+            Container(
+              margin: const EdgeInsets.only(top: 6),
+              padding: const EdgeInsets.all(6),
+              color: const Color(0x33ff5c7a),
+              child: Text(c.lastError!,
+                  style: const TextStyle(color: Color(0xffffffff))),
+            ),
+          const SizedBox(height: 8),
+          Expanded(
+            child: Row(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: <Widget>[
+                // 调色板
+                Container(
+                  width: 150,
+                  padding: const EdgeInsets.all(6),
+                  decoration: BoxDecoration(
+                    color: const Color(0xff0a0a14),
+                    borderRadius: BorderRadius.circular(8),
+                  ),
+                  child: SingleChildScrollView(
+                    child: Wrap(
+                      spacing: 4,
+                      runSpacing: 4,
+                      children: PALETTE.map((p) {
+                        final on = c.sel == p[0];
+                        return GestureDetector(
+                          onTap: () => setState(() => c.sel = p[0]),
+                          child: Container(
+                            width: 40,
+                            height: 40,
+                            decoration: BoxDecoration(
+                              color: on
+                                  ? const Color(0xff5a3a7a)
+                                  : const Color(0xff15151f),
+                              border: Border.all(
+                                color: on
+                                    ? const Color(0xffb06bff)
+                                    : const Color(0xff2a2a3a),
+                              ),
+                              borderRadius: BorderRadius.circular(4),
+                            ),
+                            child: Center(
+                              child: Text(p[1],
+                                  style: const TextStyle(
+                                      color: Color(0xffffffff), fontSize: 10)),
+                            ),
+                          ),
+                        );
+                      }).toList(),
+                    ),
+                  ),
+                ),
+                const SizedBox(width: 8),
+                // 画布
+                Expanded(
+                  child: SingleChildScrollView(
+                    scrollDirection: Axis.horizontal,
+                    child: SingleChildScrollView(
+                      child: SizedBox(
+                        width: f.w * TILE,
+                        height: f.h * TILE,
+                        child: _EditorCanvas(controller: c),
+                      ),
+                    ),
+                  ),
+                ),
+                const SizedBox(width: 8),
+                // 属性 + 面
+                Container(
+                  width: 200,
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: <Widget>[
+                      const Text('属性（选中方块）',
+                          style: TextStyle(color: Color(0xffc8c8d8))),
+                      const SizedBox(height: 6),
+                      Expanded(
+                        child: SingleChildScrollView(
+                          child: _PropsPanel(controller: c),
+                        ),
+                      ),
+                      const SizedBox(height: 8),
+                      const Text('面（多面地图）',
+                          style: TextStyle(color: Color(0xffc8c8d8))),
+                      Row(children: <Widget>[
+                        _SmallButton('+面', onPressed: c.addFace),
+                        _SmallButton('复制', onPressed: c.copyFace),
+                        _SmallButton('删除', onPressed: c.delFace),
+                      ]),
+                      ...c.faces.asMap().entries.map((e) => GestureDetector(
+                        onTap: () => setState(() => c.face = e.key),
+                        child: Container(
+                          margin: const EdgeInsets.only(top: 2),
+                          padding: const EdgeInsets.all(4),
+                          color: e.key == c.face
+                              ? const Color(0xff2a2a3a)
+                              : const Color(0xff0a0a14),
+                          child: Text(
+                              '${e.value.name}  ${e.value.w}×${e.value.h} · ${e.value.doors.length}门',
+                              style: const TextStyle(
+                                  color: Color(0xffc8c8d8), fontSize: 11)),
+                        ),
+                      )),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+          if (_importOpen)
+            _ImportModal(
+              onClose: () => setState(() => _importOpen = false),
+              onPick: (id) {
+                c.pickImport(id);
+                setState(() => _importOpen = false);
+                _syncFields();
+              },
+            ),
+        ],
+      ),
+    );
+  }
+}
+
+class _EditorCanvas extends StatelessWidget {
+  final EditorController controller;
+  const _EditorCanvas({required this.controller});
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onPanDown: (d) => _handle(d.localPosition, false),
+      onPanUpdate: (d) => _handle(d.localPosition, false),
+      onSecondaryTapDown: (d) => _handle(d.localPosition, true),
+      child: CustomPaint(
+        painter: _EditorPainter(controller),
+        size: Size(
+          controller.cur().w * TILE,
+          controller.cur().h * TILE,
+        ),
+      ),
+    );
+  }
+
+  void _handle(Offset local, bool right) {
+    final f = controller.cur();
+    final tx = (local.dx / TILE).floor();
+    final ty = (local.dy / TILE).floor();
+    if (tx < 0 || ty < 0 || tx >= f.w || ty >= f.h) return;
+    controller.paintTile(tx, ty, right);
+  }
+}
+
+class _EditorPainter extends CustomPainter {
+  final EditorController c;
+  _EditorPainter(this.c);
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final f = c.cur();
+    canvas.drawRect(
+        Rect.fromLTWH(0, 0, size.width, size.height),
+        Paint()..color = const Color(0xff101018));
+    for (int y = 0; y < f.h; y++) {
+      for (int x = 0; x < f.w; x++) {
+        final ch = f.grid[y][x];
+        final px = x * TILE;
+        final py = y * TILE;
+        if (ch != '.') {
+          drawTileReal(canvas, ch, px, py, f.props[y][x], f);
+        }
+        final gridPaint = Paint()..color = const Color(0x10ffffff);
+        canvas.drawRect(
+            Rect.fromLTWH(px + 0.5, py + 0.5, TILE - 1, TILE - 1), gridPaint);
+        if (ch == 'W') {
+          final d = f.doors.firstWhere(
+              (dd) => dd['tx'] == x && dd['ty'] == y,
+              orElse: () => <String, dynamic>{});
+          final tp = TextPainter(
+            text: TextSpan(
+              text: 'W${d['id'] ?? ''}',
+              style: const TextStyle(
+                  color: Color(0xffffffff), fontSize: 9, fontFamily: 'monospace'),
+            ),
+            textDirection: TextDirection.ltr,
+          );
+          tp.layout();
+          tp.paint(canvas, Offset(px + 2, py + 2));
+        }
+      }
+    }
+    if (c.selTx != null && c.selTy != null) {
+      canvas.drawRect(
+          Rect.fromLTWH(c.selTx! * TILE + 1, c.selTy! * TILE + 1, TILE - 2, TILE - 2),
+          Paint()
+            ..color = const Color(0xffffd23a)
+            ..style = PaintingStyle.stroke
+            ..strokeWidth = 2);
+    }
+  }
+
+  @override
+  bool shouldRepaint(_EditorPainter old) => true;
+}
+
+void drawTileReal(Canvas c, String ch, double px, double py,
+    Map<String, dynamic>? p, EditFace f) {
+  p ??= <String, dynamic>{};
+  switch (ch) {
+    case '#':
+      S.drawBlock(c, px, py, 0);
+      break;
+    case '@':
+      S.drawBlock(c, px, py, 1);
+      break;
+    case '=':
+      S.drawBlock(c, px, py, 2);
+      break;
+    case 'M':
+      S.drawBlock(c, px, py, 3);
+      break;
+    case '%':
+      S.drawIce(c, px, py);
+      break;
+    case '~':
+      S.drawWater(c, px, py, 0);
+      break;
+    case '-':
+      S.drawOneWay(c, px, py);
+      break;
+    case 'V':
+      S.drawVanish(c, px, py, 0, 0);
+      break;
+    case '^':
+      final dir = <int>[0, 1, 2, 3]['up,down,left,right'.split(',')
+          .indexOf((p['dir'] ?? 'up').toString())];
+      S.drawSpike(c, px, py, dir < 0 ? 0 : dir, 0);
+      break;
+    case '*':
+      S.drawKiller(c, px, py, 0);
+      break;
+    case 'D':
+      S.drawDropSpike(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'X':
+      S.drawGoal(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'G':
+      S.drawSave(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'P':
+      S.drawGun(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'F':
+      S.drawApple(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'J':
+      S.drawJumpRef(c, px, py, 0);
+      break;
+    case 'W':
+      S.drawWarp(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'T':
+      S.drawSign(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'O':
+      S.drawTurret(c, _Ent(x: px, y: py, w: TILE, h: TILE, dir: p['dir'] ?? 'left'), 0);
+      break;
+    case 'C':
+      S.drawCamera(c, _Ent(x: px, y: py, w: TILE, h: TILE), 0);
+      break;
+    case 'S':
+      S.drawKid(
+          c,
+          _KidView(
+            x: px + (TILE - 11) / 2,
+            y: py + (TILE - 21),
+            w: 11,
+            h: 21,
+          ),
+          0);
+      break;
+    default:
+      drawMarker(c, ch, px, py);
+  }
+}
+
+void drawMarker(Canvas c, String ch, double px, double py) {
+  final item = PALETTE.firstWhere((p) => p[0] == ch, orElse: () => <String>['', '', '#555']);
+  final col = item.length > 2 ? Color(int.parse(item[2].substring(1), radix: 16) | 0xff000000) : const Color(0xff555555);
+  c.drawRect(Rect.fromLTWH(px + 1, py + 1, TILE - 2, TILE - 2),
+      Paint()..color = col.withValues(alpha: 0.85 * 255));
+  final tp = TextPainter(
+    text: TextSpan(
+      text: ch,
+      style: const TextStyle(
+          color: Color(0xffffffff), fontSize: 14, fontFamily: 'monospace'),
+    ),
+    textAlign: TextAlign.center,
+    textDirection: TextDirection.ltr,
+  );
+  tp.layout();
+  tp.paint(c, Offset(px + TILE / 2 - tp.width / 2, py + TILE / 2 - tp.height / 2));
+}
+
+class _PropsPanel extends StatelessWidget {
+  final EditorController controller;
+  const _PropsPanel({required this.controller});
+
+  @override
+  Widget build(BuildContext context) {
+    final c = controller;
+    final f = c.cur();
+    if (c.selTx == null || c.selTy == null) {
+      return const Text('点击画布上的方块，查看并设置它的属性',
+          style: TextStyle(color: Color(0xff666680), fontSize: 12));
+    }
+    final tx = c.selTx!, ty = c.selTy!;
+    if (tx < 0 || ty < 0 || tx >= f.w || ty >= f.h) {
+      return const Text('（越界）', style: TextStyle(color: Color(0xff666680)));
+    }
+    final ch = f.grid[ty][tx];
+    final label = PALETTE.firstWhere((p) => p[0] == ch, orElse: () => <String>['?', ch])[1];
+    final fields = SCHEMA[ch];
+    if (fields == null || fields.isEmpty) {
+      if (ch == 'W') {
+        return _portalRow(c, f, tx, ty);
+      }
+      return Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: <Widget>[
+          Text('「$ch」 $label',
+              style: const TextStyle(color: Color(0xffffffff))),
+          const Text('该方块没有可设置的属性',
+              style: TextStyle(color: Color(0xff666680), fontSize: 12)),
+        ],
+      );
+    }
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: <Widget>[
+        Text('「$ch」 $label',
+            style: const TextStyle(color: Color(0xffffffff))),
+        const SizedBox(height: 6),
+        if (ch == 'W') _portalRow(c, f, tx, ty),
+        for (final fd in fields) _propField(c, f, tx, ty, fd),
+      ],
+    );
+  }
+
+  Widget _portalRow(EditorController c, EditFace f, int tx, int ty) {
+    final door = f.doors.firstWhere(
+        (d) => d['tx'] == tx && d['ty'] == ty,
+        orElse: () => <String, dynamic>{});
+    if (door.isEmpty) {
+      return const Text('（此格未登记为门，请重新放置 W）',
+          style: TextStyle(color: Color(0xff666680), fontSize: 12));
+    }
+    final cur = door['to'] as Map?;
+    final tf = cur != null ? cur['face'] as int : c.face;
+    final td = cur != null ? cur['door'] as int : -1;
+    return Row(children: <Widget>[
+      const Text('跳转到', style: TextStyle(color: Color(0xffc8c8d8))),
+      DropdownButton<int>(
+        value: tf,
+        items: c.faces
+            .asMap()
+            .entries
+            .map((e) => DropdownMenuItem<int>(
+                value: e.key, child: Text('面${e.key + 1}${e.value.name != '面${e.key + 1}' ? '·' + e.value.name : ''}')))
+            .toList(),
+        onChanged: (v) => c.setPropFaceDoor(f, tx, ty, v!, td),
+      ),
+      DropdownButton<int>(
+        value: td < 0 ? -1 : td,
+        items: [
+          const DropdownMenuItem<int>(value: -1, child: Text('（无）')),
+          ...c.faces[tf].doors
+              .where((od) => !(od['id'] == door['id'] && tf == c.face))
+              .map((od) => DropdownMenuItem<int>(
+                  value: od['id'] as int, child: Text('门${od['id']}')))
+              .toList(),
+        ],
+        onChanged: (v) => c.setPropFaceDoor(f, tx, ty, tf, v!),
+      ),
+    ]);
+  }
+
+  Widget _propField(EditorController c, EditFace f, int tx, int ty,
+      Map<String, dynamic> fd) {
+    final type = fd['type'];
+    final key = fd['key'];
+    final cur = c.propAt(tx, ty) ?? <String, dynamic>{};
+    if (type == 'text') {
+      final ctl = TextEditingController(text: cur[key] ?? '');
+      return Padding(
+        padding: const EdgeInsets.only(bottom: 6),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: <Widget>[
+            Text(fd['label'], style: const TextStyle(color: Color(0xffc8c8d8))),
+            TextField(
+              controller: ctl,
+              onChanged: (v) => c.setProp(tx, ty, key, v),
+              style: const TextStyle(color: Color(0xffffffff)),
+              decoration: const InputDecoration(
+                isCollapsed: true,
+                contentPadding: EdgeInsets.all(6),
+                border: OutlineInputBorder(),
+              ),
+            ),
+          ],
+        ),
+      );
+    }
+    if (type == 'num') {
+      final val = cur[key] ?? fd['def'] ?? '';
+      return Padding(
+        padding: const EdgeInsets.only(bottom: 6),
+        child: Row(children: <Widget>[
+          Text('${fd['label']}',
+              style: const TextStyle(color: Color(0xffc8c8d8))),
+          const SizedBox(width: 8),
+          SizedBox(
+            width: 70,
+            child: TextField(
+              controller: TextEditingController(text: val.toString()),
+              keyboardType: const TextInputType.numberWithOptions(decimal: true),
+              onChanged: (v) {
+                final step = fd['step'];
+                final num = step != null
+                    ? (double.tryParse(v) ?? 0)
+                    : (int.tryParse(v) ?? 0);
+                c.setProp(tx, ty, key, num);
+              },
+              style: const TextStyle(color: Color(0xffffffff)),
+              decoration: const InputDecoration(
+                isCollapsed: true,
+                contentPadding: EdgeInsets.all(6),
+                border: OutlineInputBorder(),
+              ),
+            ),
+          ),
+        ]),
+      );
+    }
+    if (type == 'select') {
+      final val = cur[key] ?? fd['def'];
+      return Padding(
+        padding: const EdgeInsets.only(bottom: 6),
+        child: Row(children: <Widget>[
+          Text('${fd['label']}',
+              style: const TextStyle(color: Color(0xffc8c8d8))),
+          const SizedBox(width: 8),
+          DropdownButton<String>(
+            value: val as String,
+            items: (fd['opts'] as List)
+                .map((o) => DropdownMenuItem<String>(
+                    value: (o as List)[0] as String,
+                    child: Text((o as List)[1] as String)))
+                .toList(),
+            onChanged: (v) => c.setProp(tx, ty, key, v),
+          ),
+        ]),
+      );
+    }
+    return const SizedBox();
+  }
+}
+
+class _ImportModal extends StatelessWidget {
+  final VoidCallback onClose;
+  final void Function(String) onPick;
+  const _ImportModal({required this.onClose, required this.onPick});
+
+  @override
+  Widget build(BuildContext context) {
+    final customs = Save.customs().cast<Map<String, dynamic>>();
+    return Container(
+      color: const Color(0x99000000),
+      child: Center(
+        child: Container(
+          width: 320,
+          padding: const EdgeInsets.all(16),
+          decoration: BoxDecoration(
+            color: const Color(0xff15151f),
+            borderRadius: BorderRadius.circular(12),
+          ),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: <Widget>[
+              const Text('导入地图',
+                  style: TextStyle(color: Color(0xffffffff), fontSize: 18)),
+              const SizedBox(height: 8),
+              const Text('从以前保存过的地图里选一个载入编辑器',
+                  style: TextStyle(color: Color(0xff666680), fontSize: 12)),
+              const SizedBox(height: 8),
+              if (customs.isEmpty)
+                const Text('还没有保存过的地图，先「保存」一个吧。',
+                    style: TextStyle(color: Color(0xff666680)))
+              else
+                ...customs.map((l) => GestureDetector(
+                  onTap: () => onPick(l['id'] as String),
+                  child: Container(
+                    margin: const EdgeInsets.only(bottom: 4),
+                    padding: const EdgeInsets.all(8),
+                    color: const Color(0xff0a0a14),
+                    child: Row(children: <Widget>[
+                      Text(l['name'] ?? 'MY MAP',
+                          style: const TextStyle(color: Color(0xffffffff))),
+                      const Spacer(),
+                      Text(
+                          (l['faces'] as List? ?? []).length > 0
+                              ? '${(l['faces'] as List).length} 面'
+                              : '单关',
+                          style: const TextStyle(color: Color(0xff8a8aa8))),
+                    ]),
+                  ),
+                )),
+              const SizedBox(height: 8),
+              _SmallButton('取消', onPressed: onClose),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _MenuBg extends StatelessWidget {
+  final Widget child;
+  const _MenuBg({required this.child});
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      decoration: const BoxDecoration(
+        gradient: LinearGradient(
+          begin: Alignment.topCenter,
+          end: Alignment.bottomCenter,
+          colors: <Color>[Color(0xff181828), Color(0xff08080f)],
+        ),
+      ),
+      child: SafeArea(
+        child: Padding(padding: const EdgeInsets.all(16), child: child),
+      ),
+    );
+  }
+}
+
+class _SmallButton extends StatelessWidget {
+  final String text;
+  final VoidCallback onPressed;
+  final bool on;
+  const _SmallButton(this.text,
+      {required this.onPressed, this.on = false});
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(left: 4),
+      child: ElevatedButton(
+        onPressed: onPressed,
+        style: ElevatedButton.styleFrom(
+          backgroundColor: on
+              ? const Color(0xff5a3a7a)
+              : const Color(0xff1a1a26),
+          foregroundColor: const Color(0xffffffff),
+          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+        ),
+        child: Text(text, style: const TextStyle(fontSize: 12)),
+      ),
+    );
+  }
+}
diff --git a/app/lib/src/ui/game_canvas.dart b/app/lib/src/ui/game_canvas.dart
new file mode 100644
index 0000000..ee062bf
--- /dev/null
+++ b/app/lib/src/ui/game_canvas.dart
@@ -0,0 +1,95 @@
+// 游戏画布：把 World 在 800×608 虚拟分辨率下的渲染做信箱（letterbox）缩放。
+import 'dart:ui' show Canvas, Rect, Paint, Color;
+import 'dart:math' show min;
+import 'package:flutter/widgets.dart';
+import 'package:flutter/foundation.dart' show debugPrint;
+import 'package:iwbtc/src/core/app_error.dart' show AppError;
+import 'package:iwbtc/src/game/world.dart' show World, W, H;
+
+/// 计算 800×608 虚拟画面在给定屏幕尺寸下的信箱矩形（居中、等比缩放）。
+///
+/// 画布和虚拟手柄都用它：横屏手机宽高比远大于画面比例，两侧会出现黑边，
+/// 手柄按钮必须锚定在**画面区域**内，否则会漂到黑边上（手指按到的位置和
+/// 屏幕上看到的游戏内容对不上）。尺寸非法（尚未布局完成）时返回 Rect.zero。
+Rect letterboxRect(Size size) {
+  if (!size.width.isFinite || !size.height.isFinite) return Rect.zero;
+  if (size.width <= 0 || size.height <= 0) return Rect.zero;
+  final s = min(size.width / W, size.height / H);
+  if (!s.isFinite || s <= 0) return Rect.zero;
+  final double w = W * s;
+  final double h = H * s;
+  return Rect.fromLTWH(
+      (size.width - w) / 2, (size.height - h) / 2, w, h);
+}
+
+class GameCanvas extends StatelessWidget {
+  final World world;
+  final Listenable repaint;
+  const GameCanvas({super.key, required this.world, required this.repaint});
+
+  @override
+  Widget build(BuildContext context) {
+    // 用 SizedBox.expand 明确占满父级，避免 CustomPaint 使用 Size.infinite
+    // 时在部分平台上拿到零尺寸/无穷尺寸，算出 scale = 0 而整屏消失（表现为黑屏）。
+    return SizedBox.expand(
+      child: CustomPaint(
+        painter: _GamePainter(world, repaint),
+      ),
+    );
+  }
+}
+
+class _GamePainter extends CustomPainter {
+  final World world;
+  _GamePainter(this.world, Listenable repaint) : super(repaint: repaint);
+
+  static bool _loggedFirstPaint = false;
+  static int _renderErrors = 0;
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    // 信箱外框（黑色）
+    canvas.drawRect(
+        Rect.fromLTWH(0, 0, size.width, size.height),
+        Paint()..color = const Color(0xff000000));
+
+    // 首帧可能尚未完成布局，尺寸为 0 时不要绘制内容（letterboxRect 返回 zero）。
+    final rect = letterboxRect(size);
+    if (rect.isEmpty) return;
+
+    canvas.save();
+    canvas.translate(rect.left, rect.top);
+    canvas.scale(rect.width / W, rect.width / W);
+    canvas.clipRect(Rect.fromLTWH(0, 0, W, H));
+    canvas.drawRect(
+        Rect.fromLTWH(0, 0, W, H), Paint()..color = const Color(0xff0a0a14));
+    // 渲染异常原本会被静默吞掉，画面变成纯黑。
+    // 偶发的一帧异常不该让整局报废 —— 只记录日志；但若连续多帧都失败
+    // （比如某张地图/某种渲染路径真有问题），才升级成占屏错误以便真机诊断。
+    try {
+      world.render(canvas);
+    } catch (e, s) {
+      _renderErrors++;
+      if (_renderErrors <= 3 || _renderErrors == 60) {
+        AppError.warn('游戏渲染异常（第 $_renderErrors 次，已跳过该帧）', '$e\n$s');
+      }
+      if (_renderErrors == 60) {
+        AppError.report('游戏渲染持续失败（连续 60 帧）', '$e\n$s');
+      }
+    } finally {
+      canvas.restore();
+    }
+
+    // 以有效尺寸完成一次真实渲染后才记录，便于真机确认渲染管线在跑。
+    if (!_loggedFirstPaint) {
+      _loggedFirstPaint = true;
+      debugPrint(
+          '[boot] canvas rendered: screen=${size.width}x${size.height} '
+          'stage=${rect.width}x${rect.height} at (${rect.left},${rect.top}) '
+          'state=${world.state}');
+    }
+  }
+
+  @override
+  bool shouldRepaint(_GamePainter old) => true;
+}
diff --git a/app/lib/src/ui/overlays.dart b/app/lib/src/ui/overlays.dart
new file mode 100644
index 0000000..e2e57f3
--- /dev/null
+++ b/app/lib/src/ui/overlays.dart
@@ -0,0 +1,147 @@
+// HUD / BOSS 血条 / Toast 覆盖层（对应 web 版 ui.js 的 hud/bossBar/toast）。
+import 'package:flutter/widgets.dart';
+import 'package:iwbtc/src/core/util.dart' show fmtTime;
+import 'package:iwbtc/src/game/boss.dart' show Boss;
+
+/// 顶部 HUD + BOSS 血条 + Toast。
+class HudOverlay extends StatelessWidget {
+  final ValueNotifier<Map<String, dynamic>> hud;
+  final ValueNotifier<dynamic> boss;
+  final ValueNotifier<String> toast;
+  const HudOverlay(
+      {super.key, required this.hud, required this.boss, required this.toast});
+
+  @override
+  Widget build(BuildContext context) {
+    // 注意：Positioned 必须是 Stack 的**直接子级**。
+    // 此前把它写在 ValueListenableBuilder 的返回值里（隔着一层），定位数据被丢弃，
+    // 覆盖层会像真机黑屏那次一样横向塌缩。故此处一律 Positioned 在外、监听在内。
+    return Stack(
+      children: <Widget>[
+        Positioned(
+          top: 8,
+          left: 8,
+          right: 8,
+          child: ValueListenableBuilder<Map<String, dynamic>>(
+            valueListenable: hud,
+            builder: (_, Map<String, dynamic> h, __) {
+              final totalApples = h['totalApples'] ?? 0;
+              final totalSaves = h['totalSaves'] ?? 0;
+              final save = h['save'] ?? 0;
+              return Row(
+                children: <Widget>[
+                  _box(h['name'] ?? '', flex: 1),
+                  _box('DEATH ' + (h['deaths'] ?? 0).toString()),
+                  _box(fmtTime(h['ms'] ?? 0)),
+                  // 文案与 web 版 ui.js 保持一致（中文）。
+                  if (totalApples > 0) _box('苹果 ${h['apples'] ?? 0}/$totalApples'),
+                  if (totalSaves > 0) _box('存档 $save/$totalSaves', on: save > 0),
+                ],
+              );
+            },
+          ),
+        ),
+        Positioned(
+          top: 40,
+          left: 24,
+          right: 24,
+          child: ValueListenableBuilder<dynamic>(
+            valueListenable: boss,
+            builder: (_, dynamic b, __) =>
+                b == null ? const SizedBox() : _BossBar(boss: b as Boss),
+          ),
+        ),
+        Positioned(
+          top: 66,
+          left: 0,
+          right: 0,
+          child: ValueListenableBuilder<String>(
+            valueListenable: toast,
+            builder: (_, String t, __) => t.isEmpty
+                ? const SizedBox()
+                : Center(
+                    child: Container(
+                      padding: const EdgeInsets.symmetric(
+                          horizontal: 14, vertical: 6),
+                      decoration: BoxDecoration(
+                        color: const Color(0xb0000000),
+                        borderRadius: BorderRadius.circular(6),
+                      ),
+                      child: Text(t,
+                          style: const TextStyle(
+                              color: Color(0xffffe9a8),
+                              fontSize: 14,
+                              fontFamily: 'monospace')),
+                    ),
+                  ),
+          ),
+        ),
+      ],
+    );
+  }
+
+  static Widget _box(String text, {double flex = 0, bool on = false}) {
+    final w = Expanded(
+      flex: flex > 0 ? 1 : 0,
+      child: Container(
+        margin: const EdgeInsets.only(right: 6),
+        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+        decoration: BoxDecoration(
+          color: const Color(0x99000000),
+          borderRadius: BorderRadius.circular(4),
+          border: on
+              ? Border.all(color: const Color(0xffb06bff))
+              : null,
+        ),
+        child: Text(text,
+            style: const TextStyle(
+                color: Color(0xffd8d8e8),
+                fontSize: 12,
+                fontFamily: 'monospace')),
+      ),
+    );
+    return w;
+  }
+}
+
+class _BossBar extends StatelessWidget {
+  final Boss boss;
+  const _BossBar({required this.boss});
+
+  @override
+  Widget build(BuildContext context) {
+    final ratio = (boss.hp / boss.maxHp).clamp(0.0, 1.0);
+    // 只负责内容，定位由外层 Stack 的 Positioned 提供。
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      mainAxisSize: MainAxisSize.min,
+      children: <Widget>[
+        Text(boss.name,
+            style: const TextStyle(
+                color: Color(0xffffffff),
+                fontSize: 13,
+                fontFamily: 'monospace',
+                fontWeight: FontWeight.bold)),
+        const SizedBox(height: 4),
+        Container(
+          height: 10,
+          decoration: BoxDecoration(
+            color: const Color(0x66000000),
+            borderRadius: BorderRadius.circular(5),
+            border: Border.all(color: const Color(0xffffffff)),
+          ),
+          child: FractionallySizedBox(
+            alignment: Alignment.centerLeft,
+            widthFactor: ratio,
+            child: Container(
+              decoration: BoxDecoration(
+                color: const Color(0xffff5c7a),
+                borderRadius: BorderRadius.circular(5),
+              ),
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}
diff --git a/app/lib/src/ui/screens.dart b/app/lib/src/ui/screens.dart
new file mode 100644
index 0000000..5a562d4
--- /dev/null
+++ b/app/lib/src/ui/screens.dart
@@ -0,0 +1,1009 @@
+// 菜单界面：标题 / 关卡选择 / 暂停 / 结算 / 设置（对应 web 版 ui.js + index.html 各 screen）。
+import 'package:flutter/material.dart';
+import 'package:flutter/foundation.dart' show ValueListenable;
+import 'package:flutter/services.dart' show KeyDownEvent;
+import 'package:iwbtc/src/core/save.dart';
+import 'package:iwbtc/src/game/levels.dart'
+    show LEVELS, TYPE_LABEL, TYPE_CLASS;
+import 'package:iwbtc/src/ui/touch_layout.dart'
+    show metaSettings, KEY_ACTIONS, keyLabel, defaultBindings;
+import 'package:iwbtc/src/core/input.dart' show Input;
+import 'package:iwbtc/src/game/world.dart' show World, W, H;
+
+const List<List<String>> TABS = <List<String>>[
+  <String>['all', '全部'],
+  <String>['jump', '跳刺'],
+  <String>['endur', '耐久'],
+  <String>['boss', 'BOSS'],
+  <String>['troll', '坑向'],
+  <String>['custom', '自制'],
+];
+
+String typeLabel(String t) => TYPE_LABEL[t] ?? '自制';
+String typeClass(String t) => TYPE_CLASS[t] ?? 't-custom';
+
+String stars(int d) {
+  d = d.clamp(0, 5);
+  return '★' * d + '☆' * (5 - d);
+}
+
+// ---------------- 标题 ----------------
+class TitleScreen extends StatelessWidget {
+  final World world;
+  final VoidCallback onSettings;
+  final VoidCallback onEditor;
+  const TitleScreen(
+      {super.key,
+      required this.world,
+      required this.onSettings,
+      required this.onEditor});
+
+  @override
+  Widget build(BuildContext context) {
+    final user = metaSettings()['username'] as String? ?? '';
+    return _MenuBg(
+      // 横屏手机逻辑高度只有 ~360px，标题内容更高 —— 不够高时允许滚动，
+      // 够高时仍居中（ConstrainedBox minHeight 保底），杜绝 BOTTOM OVERFLOWED。
+      child: _FitScroll(
+        child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: <Widget>[
+          const Text('FAN-MADE TRIBUTE PROJECT',
+              style: TextStyle(
+                  color: Color(0xff8a8aa8),
+                  fontSize: 12,
+                  letterSpacing: 2)),
+          const SizedBox(height: 8),
+          RichText(
+            text: const TextSpan(
+              children: <InlineSpan>[
+                TextSpan(
+                    text: 'I WANNA BE\nTHE ',
+                    style: TextStyle(
+                        color: Color(0xffffffff),
+                        fontSize: 44,
+                        fontWeight: FontWeight.bold,
+                        height: 1.05)),
+                TextSpan(
+                    text: 'CREATOR',
+                    style: TextStyle(
+                        color: Color(0xffff5c7a),
+                        fontSize: 44,
+                        fontWeight: FontWeight.bold,
+                        height: 1.05)),
+              ],
+            ),
+            textAlign: TextAlign.center,
+          ),
+          const SizedBox(height: 8),
+          const Text('跳刺 · 耐久 · BOSS · 坑向 — 23 个内置关卡',
+              style: TextStyle(color: Color(0xffc8c8d8), fontSize: 14)),
+          const SizedBox(height: 28),
+          _MenuButton('关卡选择', onPressed: () => world.toLevels()),
+          _MenuButton('自制关卡', onPressed: onEditor),
+          _MenuButton('设置', onPressed: onSettings),
+          const SizedBox(height: 18),
+          Text('玩家：${user.isEmpty ? '无名氏' : user}',
+              style: const TextStyle(color: Color(0xff8a8aa8), fontSize: 13)),
+          const SizedBox(height: 18),
+          const Text(
+              '非商业同人作品 · 致敬 I Wanna Be The Guy / I Wanna Be The Creator',
+              style: TextStyle(color: Color(0xff55556a), fontSize: 11)),
+        ],
+        ),
+      ),
+    );
+  }
+}
+
+// ---------------- 关卡选择 ----------------
+class LevelSelectScreen extends StatelessWidget {
+  final World world;
+  final ValueListenable<int> reload;
+  final VoidCallback onChanged;
+  const LevelSelectScreen(
+      {super.key,
+      required this.world,
+      required this.reload,
+      required this.onChanged});
+
+  void _play(Map<String, dynamic> lv) {
+    world.fromEditor = false;
+    world.startLevel(lv, lv['builtin'] == false ? -1 : (lv['index'] ?? -1));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return _MenuBg(
+      child: ValueListenableBuilder<int>(
+        valueListenable: reload,
+        builder: (_, __, ___) =>
+            _LevelBody(world: world, onPlay: _play, onChanged: onChanged),
+      ),
+    );
+  }
+}
+
+class _LevelBody extends StatefulWidget {
+  final World world;
+  final void Function(Map<String, dynamic>) onPlay;
+  final VoidCallback onChanged;
+  const _LevelBody(
+      {required this.world, required this.onPlay, required this.onChanged});
+
+  @override
+  State<_LevelBody> createState() => _LevelBodyState();
+}
+
+class _LevelBodyState extends State<_LevelBody> {
+  String _filter = 'all';
+  bool _manage = false;
+
+  @override
+  Widget build(BuildContext context) {
+    final customs = Save.customs().cast<Map<String, dynamic>>();
+    final all = <Map<String, dynamic>>[
+      ...LEVELS,
+      for (int i = 0; i < customs.length; i++)
+        <String, dynamic>{...customs[i], 'index': 100 + i, 'no': i + 1},
+    ];
+    final list = all.where((l) {
+      final type = l['type'] as String? ?? 'custom';
+      return _filter == 'all' ? true : type == _filter;
+    }).toList();
+
+    return Column(
+      children: <Widget>[
+        Row(
+          children: <Widget>[
+            const Text('关卡选择',
+                style: TextStyle(color: Color(0xffffffff), fontSize: 22)),
+            const Spacer(),
+            if (_filter == 'custom')
+              _SmallButton(_manage ? '完成' : '管理地图', on: _manage,
+                  onPressed: () => setState(() => _manage = !_manage)),
+            _SmallButton('返回', onPressed: () => widget.world.toTitle()),
+          ],
+        ),
+        const SizedBox(height: 10),
+        Row(
+          children: TABS.map((t) {
+            final on = _filter == t[0];
+            return Padding(
+              padding: const EdgeInsets.only(right: 6),
+              child: _Tab(t[1], on,
+                  onPressed: () => setState(() {
+                        _filter = t[0];
+                        _manage = false;
+                      })),
+            );
+          }).toList(),
+        ),
+        const SizedBox(height: 10),
+        Expanded(
+          child: list.isEmpty
+              ? const Center(
+                  child: Text('这个分类下还没有关卡。去「自制关卡」造一个吧。',
+                      style: TextStyle(color: Color(0xff666680))))
+              :                 GridView.count(
+                  crossAxisCount: 5,
+                  childAspectRatio: 0.8,
+                  mainAxisSpacing: 10,
+                  crossAxisSpacing: 10,
+                  children: list.map((l) => _LevelCard(
+                        lv: l,
+                        manage: _manage,
+                        onPlay: () => widget.onPlay(l),
+                        onDelete: () {
+                          Save.removeCustom(l['id'] as String);
+                          widget.onChanged();
+                        },
+                      )).toList(),
+                ),
+        ),
+        Wrap(
+          spacing: 6,
+          children: TABS.map((t) => _Tag(typeLabel(t[0]), typeClass(t[0]))).toList(),
+        ),
+      ],
+    );
+  }
+}
+
+class _LevelCard extends StatelessWidget {
+  final Map<String, dynamic> lv;
+  final bool manage;
+  final VoidCallback onPlay;
+  final VoidCallback onDelete;
+  const _LevelCard(
+      {required this.lv,
+      required this.manage,
+      required this.onPlay,
+      required this.onDelete});
+
+  @override
+  Widget build(BuildContext context) {
+    final rec = Save.get(lv['id'] as String? ?? '');
+    final builtin = lv['builtin'] == true;
+    final diff = (lv['diff'] as int?) ?? 1;
+    return Stack(
+      children: <Widget>[
+        GestureDetector(
+          onTap: manage && !builtin ? null : onPlay,
+          child: Container(
+            padding: const EdgeInsets.all(8),
+            decoration: BoxDecoration(
+              color: const Color(0xff15151f),
+              borderRadius: BorderRadius.circular(8),
+              border: Border.all(
+                  color: rec != null
+                      ? const Color(0xffb06bff)
+                      : const Color(0xff2a2a3a)),
+            ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: <Widget>[
+                Text(
+                  builtin ? (lv['index'] + 1).toString().padLeft(2, '0') : 'U${lv['no'] ?? ''}',
+                  style: const TextStyle(color: Color(0xff8a8aa8), fontSize: 12),
+                ),
+                const SizedBox(height: 4),
+                Expanded(
+                  child: Text(lv['name'] ?? 'STAGE',
+                      style: const TextStyle(
+                          color: Color(0xffffffff), fontSize: 14)),
+                ),
+                Row(
+                  children: <Widget>[
+                    _Tag(typeLabel(lv['type'] ?? 'custom'),
+                        typeClass(lv['type'] ?? 'custom')),
+                    const SizedBox(width: 4),
+                    Text(stars(diff),
+                        style: const TextStyle(
+                            color: Color(0xffffc63a), fontSize: 11)),
+                  ],
+                ),
+                const SizedBox(height: 4),
+                Text(
+                  rec != null
+                      ? '✔ 死亡 ${rec['deaths']} · ${(rec['time'] as int?) != null ? _fmt(rec['time'] as int) : ''}'
+                      : '未通关',
+                  style: const TextStyle(
+                      color: Color(0xff8a8aa8), fontSize: 11),
+                ),
+                if (rec != null)
+                  const Positioned(
+                    top: 6,
+                    right: 6,
+                    child: Text('✔',
+                        style: TextStyle(color: Color(0xffb06bff))),
+                  ),
+              ],
+            ),
+          ),
+        ),
+        if (manage && !builtin)
+          Positioned(
+            top: 4,
+            right: 4,
+            child: GestureDetector(
+              onTap: onDelete,
+              child: Container(
+                width: 22,
+                height: 22,
+                decoration: const BoxDecoration(
+                  color: Color(0xff5a2030),
+                  shape: BoxShape.circle,
+                ),
+                child: const Center(
+                    child: Text('✕',
+                        style: TextStyle(color: Color(0xffffffff), fontSize: 12))),
+              ),
+            ),
+          ),
+      ],
+    );
+  }
+}
+
+String _fmt(int ms) {
+  final m = (ms / 60000).floor();
+  final s = ((ms % 60000) / 1000).floor();
+  final c = ((ms % 1000) / 10).floor();
+  return '$m:${s.toString().padLeft(2, '0')}.${c.toString().padLeft(2, '0')}';
+}
+
+// ---------------- 暂停 ----------------
+class PauseScreen extends StatelessWidget {
+  final World world;
+  final String quitLabel;
+  const PauseScreen({super.key, required this.world, required this.quitLabel});
+
+  @override
+  Widget build(BuildContext context) {
+    return _Modal(
+      title: '暂停',
+      children: <Widget>[
+        _MenuButton('继续', onPressed: () => world.resume()),
+        _MenuButton('从头再来（清空存档点）',
+            onPressed: () => world.restart()),
+        _MenuButton(quitLabel, onPressed: () {
+          if (world.fromEditor) {
+            world.toEditor();
+          } else {
+            world.toLevels();
+          }
+        }),
+      ],
+    );
+  }
+}
+
+// ---------------- 结算 ----------------
+class ResultScreen extends StatelessWidget {
+  final World world;
+  final Map<String, dynamic> result;
+  const ResultScreen(
+      {super.key, required this.world, required this.result});
+
+  @override
+  Widget build(BuildContext context) {
+    final hasNext = result['hasNext'] == true;
+    return _Modal(
+      title: 'CLEAR!',
+      children: <Widget>[
+        _ResultLine('关卡', result['name'] ?? '—'),
+        _ResultLine('用时', _fmt(result['ms'] ?? 0)),
+        _ResultLine('死亡', (result['deaths'] ?? 0).toString()),
+        _ResultLine('苹果',
+            (result['totalApples'] ?? 0) > 0
+                ? '${result['apples']}/${result['totalApples']}'
+                : '—'),
+        if (result['better'] == true)
+          const Padding(
+            padding: EdgeInsets.only(top: 6),
+            child: Text('★ 新纪录！',
+                style: TextStyle(color: Color(0xffffc63a), fontSize: 16)),
+          ),
+        const SizedBox(height: 12),
+        if (hasNext)
+          _MenuButton('下一关', onPressed: () => world.nextLevel()),
+        _MenuButton('再挑战', onPressed: () => world.startLevel(
+            world.data!, world.idx)),
+        _MenuButton('关卡选择', onPressed: () => world.toLevels()),
+      ],
+    );
+  }
+}
+
+// ---------------- 设置 ----------------
+class SettingsScreen extends StatefulWidget {
+  final World world;
+  final VoidCallback onBack;
+  final bool isTouch;
+  const SettingsScreen(
+      {super.key,
+      required this.world,
+      required this.onBack,
+      required this.isTouch});
+
+  @override
+  State<SettingsScreen> createState() => _SettingsScreenState();
+}
+
+class _SettingsScreenState extends State<SettingsScreen> {
+  late Map<String, dynamic> _work;
+  String? _listeningKey; // 监听中的动作
+  int _listeningIdx = -1;
+  Map<String, String>? _conflict; // {code, label, act}
+
+  final TextEditingController _nameCtl = TextEditingController();
+  final FocusNode _listenNode = FocusNode();
+  final Map<String, dynamic> _touch = <String, dynamic>{}; // 手柄布局工作副本
+
+  @override
+  void initState() {
+    super.initState();
+    final s = metaSettings();
+    _work = <String, dynamic>{
+      'username': s['username'] ?? '',
+      'keys': _cloneKeys(s['keys'] as Map),
+    };
+    // 手柄布局工作副本（cx/cy/size 三个数值）
+    final t = s['touch'] as Map;
+    t.forEach((k, v) => _touch[k.toString()] = _cloneTouch(v as Map));
+    _nameCtl.text = _work['username'] as String;
+  }
+
+  /// 键位表克隆：action -> List<String>。
+  Map<String, dynamic> _cloneKeys(Map m) => <String, dynamic>{
+        for (final e in m.entries)
+          e.key.toString():
+              List<String>.from((e.value as List).map((x) => x.toString())),
+      };
+
+  /// 手柄布局克隆：button -> {cx, cy, size}（数值）。
+  /// 注意这里**不能**复用 _cloneKeys —— 两种结构的值类型不同（List vs Map），
+  /// 早期混用导致点「设置」直接抛 CastError，设置界面根本打不开。
+  Map<String, dynamic> _cloneTouch(Map m) => <String, dynamic>{
+        'cx': double.tryParse(m['cx'].toString()) ?? 50,
+        'cy': double.tryParse(m['cy'].toString()) ?? 50,
+        'size': double.tryParse(m['size'].toString()) ?? 50,
+      };
+
+  String? _conflictInfo(String code, String act, int idx) {
+    for (final a in KEY_ACTIONS) {
+      final arr = (_work['keys'][a[0]] as List?) ?? <dynamic>[];
+      for (int i = 0; i < arr.length; i++) {
+        if (arr[i] == code && !(a[0] == act && i == idx)) return a[1];
+      }
+    }
+    return null;
+  }
+
+  KeyEventResult _onKeyCapture(FocusNode node, KeyEvent e) {
+    if (_listeningKey == null) return KeyEventResult.ignored;
+    if (e is KeyDownEvent) {
+      final code = e.logicalKey.debugName?.replaceAll(' ', '') ?? '';
+      if (code == 'Escape') {
+        setState(() {
+          _listeningKey = null;
+          _conflict = null;
+        });
+        return KeyEventResult.ignored;
+      }
+      final clash = _conflictInfo(code, _listeningKey!, _listeningIdx);
+      if (clash != null) {
+        setState(() => _conflict = <String, String>{
+              'code': code,
+              'label': clash,
+              'act': _listeningKey!,
+            });
+        return KeyEventResult.ignored;
+      }
+      final arr =
+          (_work['keys'][_listeningKey!] as List?) ?? <dynamic>[];
+      if (_listeningIdx >= arr.length) {
+        arr.add(code);
+      } else {
+        arr[_listeningIdx] = code;
+      }
+      setState(() {
+        _listeningKey = null;
+        _conflict = null;
+      });
+    }
+    return KeyEventResult.ignored;
+  }
+
+  void _confirm() {
+    final s = metaSettings();
+    _work['username'] = _nameCtl.text.trim().substring(0, _nameCtl.text.trim().length.clamp(0, 16));
+    s['username'] = _work['username'];
+    s['keys'] = _work['keys'];
+    s['touch'] = _touch;
+    Save.flush();
+    Input.applyBindings(_work['keys'] as Map<String, List<String>>);
+    widget.onBack();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return _MenuBg(
+      child: Focus(
+        autofocus: true,
+        focusNode: _listenNode,
+        onKeyEvent: _onKeyCapture,
+        child: _FitScroll(
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: <Widget>[
+              Row(children: <Widget>[
+                const Text('设置',
+                    style: TextStyle(color: Color(0xffffffff), fontSize: 22)),
+                const Spacer(),
+                _SmallButton('返回', onPressed: widget.onBack),
+              ]),
+            const SizedBox(height: 14),
+            Row(children: <Widget>[
+              const Text('用户名', style: TextStyle(color: Color(0xffc8c8d8))),
+              const SizedBox(width: 10),
+              SizedBox(
+                width: 180,
+                child: TextField(
+                  controller: _nameCtl,
+                  maxLength: 16,
+                  style: const TextStyle(color: Color(0xffffffff)),
+                  decoration: const InputDecoration(
+                    hintText: '无名氏',
+                    hintStyle: TextStyle(color: Color(0xff55556a)),
+                    isCollapsed: true,
+                    contentPadding: EdgeInsets.symmetric(vertical: 6, horizontal: 8),
+                    border: OutlineInputBorder(),
+                  ),
+                ),
+              ),
+              const SizedBox(width: 10),
+              const Text('显示在标题界面',
+                  style: TextStyle(color: Color(0xff55556a), fontSize: 12)),
+            ]),
+            const SizedBox(height: 16),
+            if (!widget.isTouch) ...<Widget>[
+              const Text('键盘按键',
+                  style: TextStyle(color: Color(0xffc8c8d8))),
+              const SizedBox(height: 4),
+              const Text('点击按键后按下新键即可重绑；同一动作可绑定多个键，点 × 删除',
+                  style: TextStyle(color: Color(0xff55556a), fontSize: 12)),
+              const SizedBox(height: 8),
+              if (_conflict != null)
+                Container(
+                  padding: const EdgeInsets.all(6),
+                  color: const Color(0x33ff5c7a),
+                  child: Text(
+                      '「${keyLabel(_conflict!['code']!)}」已被【${_conflict!['label']}】占用，请换一个键（Esc 取消）',
+                      style: const TextStyle(color: Color(0xffffffff), fontSize: 12)),
+                ),
+              ...KEY_ACTIONS.map((a) => _KeyRow(
+                    act: a[0],
+                    label: a[1],
+                    keys: (_work['keys'][a[0]] as List?) ?? <dynamic>[],
+                    listening: _listeningKey == a[0],
+                    onChip: (idx) => setState(() {
+                      _listeningKey = a[0];
+                      _listeningIdx = idx;
+                      _conflict = null;
+                    }),
+                    onRemove: (idx) => setState(() {
+                      (_work['keys'][a[0]] as List).removeAt(idx);
+                    }),
+                    onAdd: () => setState(() {
+                      _listeningKey = a[0];
+                      _listeningIdx = 1 << 30;
+                      _conflict = null;
+                    }),
+                  )),
+            ] else ...<Widget>[
+              const Text('手机操作按钮',
+                  style: TextStyle(color: Color(0xffc8c8d8))),
+              const SizedBox(height: 4),
+              const Text('拖动按钮调整位置，拖动右下角圆点调整大小（仅移动端生效）',
+                  style: TextStyle(color: Color(0xff55556a), fontSize: 12)),
+              const SizedBox(height: 8),
+              _TouchPreview(touch: _touch),
+            ],
+            // 纵向 Spacer 在滚动容器（无界高度）里会抛异常，换成固定间距。
+            const SizedBox(height: 16),
+            Row(children: <Widget>[
+              _SmallButton('恢复默认', onPressed: () {
+                setState(() {
+                  _work['keys'] = defaultBindings();
+                  final s = metaSettings();
+                  _touch.clear();
+                  (s['touch'] as Map).forEach(
+                      (k, v) => _touch[k.toString()] = _cloneTouch(v as Map));
+                  _nameCtl.text = '';
+                });
+              }),
+              const Spacer(),
+              _SmallButton('确定', on: true, onPressed: _confirm),
+            ]),
+          ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _KeyRow extends StatelessWidget {
+  final String act;
+  final String label;
+  final List<dynamic> keys;
+  final bool listening;
+  final void Function(int) onChip;
+  final void Function(int) onRemove;
+  final VoidCallback onAdd;
+  const _KeyRow(
+      {required this.act,
+      required this.label,
+      required this.keys,
+      required this.listening,
+      required this.onChip,
+      required this.onRemove,
+      required this.onAdd});
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 3),
+      child: Row(children: <Widget>[
+        SizedBox(
+            width: 110,
+            child: Text(label,
+                style: const TextStyle(color: Color(0xffc8c8d8)))),
+        Wrap(
+          spacing: 6,
+          children: <Widget>[
+            for (int i = 0; i < keys.length; i++)
+              GestureDetector(
+                onTap: () => onChip(i),
+                child: Container(
+                  padding:
+                      const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+                  decoration: BoxDecoration(
+                    color: listening && i == 0
+                        ? const Color(0xff5a2030)
+                        : const Color(0xff2a2a3a),
+                    borderRadius: BorderRadius.circular(4),
+                  ),
+                  child: Row(children: <Widget>[
+                    Text(keyLabel(keys[i] as String),
+                        style: const TextStyle(color: Color(0xffffffff))),
+                    const SizedBox(width: 4),
+                    GestureDetector(
+                      onTap: () => onRemove(i),
+                      child: const Text('×',
+                          style: TextStyle(color: Color(0xffff5c7a))),
+                    ),
+                  ]),
+                ),
+              ),
+            GestureDetector(
+              onTap: onAdd,
+              child: Container(
+                padding:
+                    const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+                decoration: BoxDecoration(
+                  color: const Color(0xff1a1a26),
+                  borderRadius: BorderRadius.circular(4),
+                  border: Border.all(color: const Color(0xff3a3a4a)),
+                ),
+                child: const Text('＋ 添加',
+                    style: TextStyle(color: Color(0xff8a8aa8), fontSize: 11)),
+              ),
+            ),
+            if (listening)
+              const Text('按下一个键…（Esc 取消）',
+                  style: TextStyle(color: Color(0xffffe9a8), fontSize: 11)),
+          ],
+        ),
+      ]),
+    );
+  }
+}
+
+class _TouchPreview extends StatelessWidget {
+  final Map<String, dynamic> touch;
+  const _TouchPreview({required this.touch});
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      height: 280,
+      decoration: BoxDecoration(
+        color: const Color(0xff0a0a14),
+        borderRadius: BorderRadius.circular(8),
+        border: Border.all(color: const Color(0xff2a2a3a)),
+      ),
+      child: LayoutBuilder(
+        builder: (BuildContext _, BoxConstraints cons) {
+          // 预览区按**真实画面比例 800×608** 居中显示。
+          // 移动端虚拟手柄锚定的是画面区域（letterboxRect）而非整屏，
+          // 比例一致才能做到"拖到哪、实际就在哪"。
+          final double aspect = W / H;
+          double w = cons.maxWidth - 16;
+          double h = w / aspect;
+          final double maxH = cons.maxHeight - 34; // 顶部提示文字占位
+          if (h > maxH) {
+            h = maxH;
+            w = h * aspect;
+          }
+          return Column(
+            children: <Widget>[
+              const Padding(
+                padding: EdgeInsets.symmetric(vertical: 6),
+                child: Center(
+                  child: Text('拖动按钮移动位置（预览比例与实际画面一致）',
+                      style: TextStyle(color: Color(0xff55556a), fontSize: 11)),
+                ),
+              ),
+              SizedBox(
+                width: w,
+                height: h,
+                child: Stack(
+                  children: <Widget>[
+                    Container(
+                      decoration: BoxDecoration(
+                        color: const Color(0x22141826),
+                        border: Border.all(color: const Color(0xff2a2a44)),
+                      ),
+                    ),
+                    for (final entry in touch.entries)
+                      _DragBtn(entry.key, entry.value as Map<String, dynamic>,
+                          w, h),
+                  ],
+                ),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+}
+
+class _DragBtn extends StatefulWidget {
+  final String key2;
+  final Map<String, dynamic> p;
+  final double boxW;
+  final double boxH;
+  const _DragBtn(this.key2, this.p, this.boxW, this.boxH);
+
+  @override
+  State<_DragBtn> createState() => _DragBtnState();
+}
+
+class _DragBtnState extends State<_DragBtn> {
+  @override
+  Widget build(BuildContext context) {
+    final p = widget.p;
+    final cx = (p['cx'] as num).toDouble();
+    final cy = (p['cy'] as num).toDouble();
+    final size = (p['size'] as num).toDouble();
+    // 与真机手柄同一套换算：真实按钮（屏幕像素）= size × (画面宽/800)，
+    // 预览只是把画面缩小了 boxW/800 倍，因此这里用同一个系数，所见即所得。
+    final double k = widget.boxW / 800;
+    final double sz = size * k;
+    return Positioned(
+      left: cx / 100 * widget.boxW - sz / 2,
+      top: cy / 100 * widget.boxH - sz / 2,
+      width: sz,
+      height: sz,
+      child: GestureDetector(
+        onPanUpdate: (d) {
+          // delta 换算成预览区的百分比（拖到哪里，画面上的相对位置就到哪里）
+          final dx = d.delta.dx / widget.boxW * 100;
+          final dy = d.delta.dy / widget.boxH * 100;
+          setState(() {
+            p['cx'] = (cx + dx).clamp(3.0, 97.0);
+            p['cy'] = (cy + dy).clamp(3.0, 97.0);
+          });
+        },
+        child: Container(
+          decoration: BoxDecoration(
+            color: const Color(0x553a6ea5),
+            shape: widget.key2 == 'jump'
+                ? BoxShape.circle
+                : BoxShape.rectangle,
+            borderRadius: widget.key2 == 'jump'
+                ? null
+                : BorderRadius.circular(10),
+            border: Border.all(color: const Color(0xff7ae0ff)),
+          ),
+          child: Center(
+            child: Text(_btnLabel(widget.key2),
+                style: const TextStyle(color: Color(0xffffffff), fontSize: 14)),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+String _btnLabel(String k) {
+  switch (k) {
+    case 'left':
+      return '◀';
+    case 'right':
+      return '▶';
+    case 'jump':
+      return '跳';
+    case 'shoot':
+      return '🔫';
+    case 'down':
+      return '▼';
+    case 'pause':
+      return '❚❚';
+    case 'suicide':
+      return '↺';
+    default:
+      return k;
+  }
+}
+
+// ---------------- 通用小部件 ----------------
+/// 菜单内容自适应包装：空间够时按原布局（子级自己决定居中/顶对齐），
+/// 空间不够（横屏手机逻辑高度 ~360px）时允许整体滚动，杜绝 BOTTOM OVERFLOWED。
+/// 注意：内部不能放 Spacer/Expanded（需要有限高度），列表类屏幕请用 ListView 自滚。
+class _FitScroll extends StatelessWidget {
+  final Widget child;
+  const _FitScroll({required this.child});
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (BuildContext context, BoxConstraints c) =>
+          SingleChildScrollView(
+        child: ConstrainedBox(
+          constraints: BoxConstraints(
+              minHeight: c.maxHeight.isFinite ? c.maxHeight : 0),
+          child: child,
+        ),
+      ),
+    );
+  }
+}
+
+class _MenuBg extends StatelessWidget {
+  final Widget child;
+  const _MenuBg({required this.child});
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      decoration: const BoxDecoration(
+        gradient: LinearGradient(
+          begin: Alignment.topCenter,
+          end: Alignment.bottomCenter,
+          colors: <Color>[Color(0xff181828), Color(0xff08080f)],
+        ),
+      ),
+      child: SafeArea(
+        child: Padding(padding: const EdgeInsets.all(20), child: child),
+      ),
+    );
+  }
+}
+
+class _MenuButton extends StatelessWidget {
+  final String text;
+  final VoidCallback onPressed;
+  const _MenuButton(this.text, {required this.onPressed});
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 5),
+      child: SizedBox(
+        width: 240,
+        child: ElevatedButton(
+          onPressed: onPressed,
+          style: ElevatedButton.styleFrom(
+            backgroundColor: const Color(0xff2a2a3a),
+            foregroundColor: const Color(0xffffffff),
+            padding: const EdgeInsets.symmetric(vertical: 12),
+          ),
+          child: Text(text, style: const TextStyle(fontSize: 16)),
+        ),
+      ),
+    );
+  }
+}
+
+class _SmallButton extends StatelessWidget {
+  final String text;
+  final VoidCallback onPressed;
+  final bool on;
+  const _SmallButton(this.text, {required this.onPressed, this.on = false});
+  @override
+  Widget build(BuildContext context) {
+    return ElevatedButton(
+      onPressed: onPressed,
+      style: ElevatedButton.styleFrom(
+        backgroundColor:
+            on ? const Color(0xff5a3a7a) : const Color(0xff1a1a26),
+        foregroundColor: const Color(0xffffffff),
+        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+      ),
+      child: Text(text, style: const TextStyle(fontSize: 13)),
+    );
+  }
+}
+
+class _Tab extends StatelessWidget {
+  final String text;
+  final bool on;
+  final VoidCallback onPressed;
+  const _Tab(this.text, this.on, {required this.onPressed});
+  @override
+  Widget build(BuildContext context) {
+    return ElevatedButton(
+      onPressed: onPressed,
+      style: ElevatedButton.styleFrom(
+        backgroundColor:
+            on ? const Color(0xffb06bff) : const Color(0xff1a1a26),
+        foregroundColor: const Color(0xffffffff),
+        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 5),
+      ),
+      child: Text(text, style: const TextStyle(fontSize: 12)),
+    );
+  }
+}
+
+class _Tag extends StatelessWidget {
+  final String text;
+  final String cls;
+  const _Tag(this.text, this.cls);
+  @override
+  Widget build(BuildContext context) {
+    final color = _tagColor(cls);
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
+      decoration: BoxDecoration(
+        color: color.withValues(alpha: 0.2 * 255),
+        borderRadius: BorderRadius.circular(4),
+        border: Border.all(color: color),
+      ),
+      child:
+          Text(text, style: TextStyle(color: color, fontSize: 11)),
+    );
+  }
+}
+
+Color _tagColor(String cls) {
+  switch (cls) {
+    case 't-jump':
+      return const Color(0xff3ddc84);
+    case 't-endur':
+      return const Color(0xff4f9e46);
+    case 't-boss':
+      return const Color(0xffff5c7a);
+    case 't-troll':
+      return const Color(0xffc9a86b);
+    default:
+      return const Color(0xff7ae0ff);
+  }
+}
+
+class _Modal extends StatelessWidget {
+  final String title;
+  final List<Widget> children;
+  const _Modal({required this.title, required this.children});
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      color: const Color(0x99000000),
+      child: Center(
+        child: Container(
+          width: 320,
+          padding: const EdgeInsets.all(20),
+          decoration: BoxDecoration(
+            color: const Color(0xff15151f),
+            borderRadius: BorderRadius.circular(12),
+            border: Border.all(color: const Color(0xff2a2a3a)),
+          ),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: <Widget>[
+              Text(title,
+                  style: const TextStyle(
+                      color: Color(0xffffffff),
+                      fontSize: 26,
+                      fontWeight: FontWeight.bold)),
+              const SizedBox(height: 16),
+              ...children,
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _ResultLine extends StatelessWidget {
+  final String k;
+  final String v;
+  const _ResultLine(this.k, this.v);
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 3),
+      child: Row(children: <Widget>[
+        SizedBox(
+            width: 60,
+            child: Text(k,
+                style: const TextStyle(color: Color(0xff8a8aa8)))),
+        Text(v,
+            style: const TextStyle(
+                color: Color(0xffffffff), fontSize: 15)),
+      ]),
+    );
+  }
+}
diff --git a/app/lib/src/ui/touch_controls.dart b/app/lib/src/ui/touch_controls.dart
new file mode 100644
index 0000000..12684b9
--- /dev/null
+++ b/app/lib/src/ui/touch_controls.dart
@@ -0,0 +1,190 @@
+// 移动端虚拟手柄（对应 web 版 touch.js）：方向 + 跳跃 + 射击/下蹲 + 暂停/重生。
+import 'dart:async';
+import 'package:flutter/widgets.dart';
+import 'package:iwbtc/src/core/input.dart' show Input;
+import 'package:iwbtc/src/ui/touch_layout.dart'
+    show BUTTONS, metaSettings;
+import 'package:iwbtc/src/game/world.dart' show World, W;
+import 'package:iwbtc/src/ui/game_canvas.dart' show letterboxRect;
+
+class TouchControls extends StatelessWidget {
+  final World world;
+  final ValueNotifier<bool> visible;
+  final ValueNotifier<bool> hasGun;
+  const TouchControls(
+      {super.key,
+      required this.world,
+      required this.visible,
+      required this.hasGun});
+
+  @override
+  Widget build(BuildContext context) {
+    final touch = metaSettings()['touch'] as Map;
+    return ValueListenableBuilder<bool>(
+      valueListenable: visible,
+      builder: (_, bool v, __) {
+        if (!v) return const SizedBox();
+        // 按钮锚定在「信箱缩放后的画面矩形」内，而不是整块屏幕：
+        // 横屏时两侧是黑边，若按全屏百分比定位，左/右/跳跃键会飘到黑边上。
+        return LayoutBuilder(
+          builder: (_, BoxConstraints cons) {
+            final area = letterboxRect(Size(cons.maxWidth, cons.maxHeight));
+            return Stack(
+              children: <Widget>[
+                for (final b in BUTTONS)
+                  _TouchButton(
+                    world: world,
+                    keyName: b.key,
+                    label: b.label,
+                    label2: b.label2,
+                    shape: b.shape,
+                    cx: (touch[b.key]?['cx'] ?? 50).toDouble(),
+                    cy: (touch[b.key]?['cy'] ?? 50).toDouble(),
+                    size: (touch[b.key]?['size'] ?? 50).toDouble(),
+                    hasGun: hasGun,
+                    area: area,
+                  ),
+              ],
+            );
+          },
+        );
+      },
+    );
+  }
+}
+
+class _TouchButton extends StatefulWidget {
+  final World world;
+  final String keyName;
+  final String label;
+  final String? label2;
+  final String shape;
+  final double cx;
+  final double cy;
+  final double size;
+  final ValueNotifier<bool> hasGun;
+
+  /// 画面区域（信箱缩放后的矩形）；按钮在其中按百分比定位。
+  /// 空 Rect 表示尚未完成布局，此时不渲染。
+  final Rect area;
+
+  const _TouchButton(
+      {required this.world,
+      required this.keyName,
+      required this.label,
+      this.label2,
+      required this.shape,
+      required this.cx,
+      required this.cy,
+      required this.size,
+      required this.hasGun,
+      required this.area});
+
+  @override
+  State<_TouchButton> createState() => _TouchButtonState();
+}
+
+class _TouchButtonState extends State<_TouchButton> {
+  Timer? _shootTimer;
+  bool _pressed = false;
+
+  @override
+  void dispose() {
+    _shootTimer?.cancel();
+    super.dispose();
+  }
+
+  void _press() {
+    if (_pressed) return;
+    _pressed = true;
+    final a = widget.keyName;
+    if (a == 'shoot') {
+      widget.world.shoot();
+      _shootTimer = Timer.periodic(const Duration(milliseconds: 140), (_) {
+        widget.world.shoot();
+      });
+    } else if (a == 'pause') {
+      widget.world.pause();
+    } else if (a == 'suicide') {
+      widget.world.suicide();
+    } else {
+      Input.setTouch(a, true);
+    }
+    setState(() {});
+  }
+
+  void _release() {
+    if (!_pressed) return;
+    _pressed = false;
+    _shootTimer?.cancel();
+    _shootTimer = null;
+    final a = widget.keyName;
+    if (a == 'shoot' || a == 'pause' || a == 'suicide') {
+      // 瞬时动作，无需松开处理
+    } else {
+      Input.setTouch(a, false);
+    }
+    setState(() {});
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final Rect area = widget.area;
+    if (area.isEmpty) return const SizedBox.shrink();
+    // 按钮尺寸随画面缩放等比放大：默认数值是按 800 宽的画面设计的，
+    // 大屏/高 DPI 下直接套用会显得过小（反之亦然）；限制在合理区间避免失控。
+    final double k = (area.width / W).clamp(0.6, 2.6);
+    final double sz = widget.size * k;
+    final left = area.left + widget.cx / 100 * area.width - sz / 2;
+    final top = area.top + widget.cy / 100 * area.height - sz / 2;
+    final isJump = widget.shape == 'jump';
+    return Positioned(
+      left: left,
+      top: top,
+      width: sz,
+      height: sz,
+      child: Listener(
+        onPointerDown: (_) => _press(),
+        onPointerUp: (_) => _release(),
+        onPointerCancel: (_) => _release(),
+        child: ValueListenableBuilder<bool>(
+          valueListenable: widget.hasGun,
+          builder: (_, __, ___) {
+            final off = widget.keyName == 'shoot' && !widget.hasGun.value;
+            return Opacity(
+              opacity: off ? 0.3 : 1,
+              child: Container(
+                decoration: BoxDecoration(
+                  color: _pressed
+                      ? const Color(0x88ffffff)
+                      : const Color(0x444a5a7a),
+                  shape: isJump ? BoxShape.circle : BoxShape.rectangle,
+                  borderRadius: isJump ? null : BorderRadius.circular(sz * 0.3),
+                  border: Border.all(
+                      color: const Color(0xff7ae0ff), width: 2),
+                ),
+                child: Center(
+                  child: Column(
+                    mainAxisSize: MainAxisSize.min,
+                    children: <Widget>[
+                      Text(widget.label,
+                          style: TextStyle(
+                              color: const Color(0xffffffff),
+                              fontSize: sz * 0.32,
+                              fontWeight: FontWeight.bold)),
+                      if (widget.label2 != null)
+                        Text(widget.label2!,
+                            style: TextStyle(
+                                color: const Color(0xffcfe8ff),
+                                fontSize: sz * 0.16)),
+                    ],
+                  ),
+                ),
+              ),
+            );
+          },
+        ),
+      ),
+    );
+  }
+}
diff --git a/app/lib/src/ui/touch_layout.dart b/app/lib/src/ui/touch_layout.dart
new file mode 100644
index 0000000..1229f7f
--- /dev/null
+++ b/app/lib/src/ui/touch_layout.dart
@@ -0,0 +1,104 @@
+// 触屏手柄按钮定义与默认布局（对应 web 版 settings.js 的 BUTTONS / DEFAULT_TOUCH）。
+// 坐标 cx/cy 为相对舞台中心的百分比，size 为按钮边长（px）。
+import 'package:iwbtc/src/core/save.dart';
+
+class TouchBtn {
+  final String key;
+  final String label;
+  final String shape;
+  final String? label2;
+  final double cx;
+  final double cy;
+  final double size;
+  const TouchBtn(this.key, this.label, this.shape, this.cx, this.cy, this.size,
+      [this.label2]);
+}
+
+const List<TouchBtn> BUTTONS = <TouchBtn>[
+  TouchBtn('left', '◀', 'round', 12, 80, 62),
+  TouchBtn('right', '▶', 'round', 24, 80, 62),
+  TouchBtn('jump', '跳', 'jump', 88, 84, 94),
+  TouchBtn('shoot', '🔫', 'item', 79, 72, 54, '射击'),
+  TouchBtn('down', '▼', 'item', 90, 72, 54, '下蹲'),
+  TouchBtn('pause', '❚❚', 'sm', 81, 58, 42),
+  TouchBtn('suicide', '↺', 'sm', 90, 58, 42),
+];
+
+const List<List<String>> KEY_ACTIONS = <List<String>>[
+  <String>['left', '左移'],
+  <String>['right', '右移'],
+  <String>['up', '上（上浮）'],
+  <String>['jump', '跳跃'],
+  <String>['shoot', '射击'],
+  <String>['suicide', '自杀 / 重生'],
+  <String>['restart', '整关重来'],
+  <String>['pause', '暂停'],
+];
+
+Map<String, dynamic> defaultTouch() {
+  final m = <String, dynamic>{};
+  for (final b in BUTTONS) {
+    m[b.key] = <String, dynamic>{
+      'cx': b.cx,
+      'cy': b.cy,
+      'size': b.size,
+    };
+  }
+  return m;
+}
+
+Map<String, dynamic> defaultSettings() => <String, dynamic>{
+      'username': '',
+      'touch': defaultTouch(),
+      'keys': defaultBindings(),
+    };
+
+Map<String, List<String>> defaultBindings() => <String, List<String>>{
+      'left': <String>['ArrowLeft', 'KeyA'],
+      'right': <String>['ArrowRight', 'KeyD'],
+      'up': <String>['ArrowUp', 'KeyW'],
+      'down': <String>['ArrowDown', 'KeyS'],
+      'jump': <String>['ShiftLeft', 'ShiftRight', 'Space', 'KeyZ', 'KeyN'],
+      'shoot': <String>['KeyX', 'KeyJ', 'KeyC', 'KeyM'],
+      'suicide': <String>['KeyR'],
+      'restart': <String>['Backspace'],
+      'pause': <String>['Escape', 'KeyP'],
+    };
+
+/// 读取/补全存档里的设置对象（保证 touch / keys 字段齐全）。
+Map<String, dynamic> metaSettings() {
+  final s = Save.settings();
+  if (s['username'] is! String) s['username'] = '';
+  if (s['touch'] is! Map) s['touch'] = defaultTouch();
+  if (s['keys'] is! Map) s['keys'] = defaultBindings();
+  return s;
+}
+
+String keyLabel(String code) {
+  const Map<String, String> M = <String, String>{
+    'Space': '空格',
+    'ShiftLeft': 'Shift',
+    'ShiftRight': 'Shift',
+    'ControlLeft': 'Ctrl',
+    'ControlRight': 'Ctrl',
+    'AltLeft': 'Alt',
+    'AltRight': 'Alt',
+    'Tab': 'Tab',
+    'Backspace': '⌫',
+    'Escape': 'Esc',
+    'Enter': 'Enter',
+    'ArrowLeft': '←',
+    'ArrowRight': '→',
+    'ArrowUp': '↑',
+    'ArrowDown': '↓',
+    'MetaLeft': 'Win',
+    'MetaRight': 'Win',
+    'ContextMenu': '菜单',
+  };
+  if (M.containsKey(code)) return M[code]!;
+  if (code.startsWith('Key')) return code.substring(3);
+  if (code.startsWith('Digit')) return code.substring(5);
+  if (code.startsWith('Numpad')) return '小键' + code.substring(6);
+  if (RegExp(r'^F\d{1,2}$').hasMatch(code)) return code;
+  return code;
+}
diff --git a/app/linux/.gitignore b/app/linux/.gitignore
new file mode 100644
index 0000000..d3896c9
--- /dev/null
+++ b/app/linux/.gitignore
@@ -0,0 +1 @@
+flutter/ephemeral
diff --git a/app/linux/CMakeLists.txt b/app/linux/CMakeLists.txt
new file mode 100644
index 0000000..ccd29c8
--- /dev/null
+++ b/app/linux/CMakeLists.txt
@@ -0,0 +1,128 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.13)
+project(runner LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "iwbtc")
+# The unique GTK application identifier for this application. See:
+# https://wiki.gnome.org/HowDoI/ChooseApplicationID
+set(APPLICATION_ID "com.iwbtc.iwbtc")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(SET CMP0063 NEW)
+
+# Load bundled libraries from the lib/ directory relative to the binary.
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Define build configuration options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_14)
+  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+
+# Application build; see runner/CMakeLists.txt.
+add_subdirectory("runner")
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
+
+# Only the install-generated bundle's copy of the executable will launch
+# correctly, since the resources must in the right relative locations. To avoid
+# people trying to run the unbundled copy, put it in a subdirectory instead of
+# the default top-level location.
+set_target_properties(${BINARY_NAME}
+  PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
+)
+
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# By default, "installing" just makes a relocatable bundle in the build
+# directory.
+set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+# Start with a clean build bundle directory every time.
+install(CODE "
+  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
+  " COMPONENT Runtime)
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
+  install(FILES "${bundled_library}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endforeach(bundled_library)
+
+# Copy the native assets provided by the build.dart from all packages.
+set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
+install(DIRECTORY "${NATIVE_ASSETS_DIR}"
+   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+   COMPONENT Runtime)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
+  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
diff --git a/app/linux/flutter/CMakeLists.txt b/app/linux/flutter/CMakeLists.txt
new file mode 100644
index 0000000..d5bd016
--- /dev/null
+++ b/app/linux/flutter/CMakeLists.txt
@@ -0,0 +1,88 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.10)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+
+# Serves the same purpose as list(TRANSFORM ... PREPEND ...),
+# which isn't available in 3.10.
+function(list_prepend LIST_NAME PREFIX)
+    set(NEW_LIST "")
+    foreach(element ${${LIST_NAME}})
+        list(APPEND NEW_LIST "${PREFIX}${element}")
+    endforeach(element)
+    set(${LIST_NAME} "${NEW_LIST}" PARENT_SCOPE)
+endfunction()
+
+# === Flutter Library ===
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
+
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/lib/libapp.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "fl_basic_message_channel.h"
+  "fl_binary_codec.h"
+  "fl_binary_messenger.h"
+  "fl_dart_project.h"
+  "fl_engine.h"
+  "fl_json_message_codec.h"
+  "fl_json_method_codec.h"
+  "fl_message_codec.h"
+  "fl_method_call.h"
+  "fl_method_channel.h"
+  "fl_method_codec.h"
+  "fl_method_response.h"
+  "fl_plugin_registrar.h"
+  "fl_plugin_registry.h"
+  "fl_standard_message_codec.h"
+  "fl_standard_method_codec.h"
+  "fl_string_codec.h"
+  "fl_value.h"
+  "fl_view.h"
+  "flutter_linux.h"
+)
+list_prepend(FLUTTER_LIBRARY_HEADERS "${EPHEMERAL_DIR}/flutter_linux/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}")
+target_link_libraries(flutter INTERFACE
+  PkgConfig::GTK
+  PkgConfig::GLIB
+  PkgConfig::GIO
+)
+add_dependencies(flutter flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
+      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+)
diff --git a/app/linux/flutter/generated_plugin_registrant.cc b/app/linux/flutter/generated_plugin_registrant.cc
new file mode 100644
index 0000000..1830e5c
--- /dev/null
+++ b/app/linux/flutter/generated_plugin_registrant.cc
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+#include <audioplayers_linux/audioplayers_linux_plugin.h>
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) audioplayers_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "AudioplayersLinuxPlugin");
+  audioplayers_linux_plugin_register_with_registrar(audioplayers_linux_registrar);
+}
diff --git a/app/linux/flutter/generated_plugin_registrant.h b/app/linux/flutter/generated_plugin_registrant.h
new file mode 100644
index 0000000..e0f0a47
--- /dev/null
+++ b/app/linux/flutter/generated_plugin_registrant.h
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
diff --git a/app/linux/flutter/generated_plugins.cmake b/app/linux/flutter/generated_plugins.cmake
new file mode 100644
index 0000000..f4bf1dc
--- /dev/null
+++ b/app/linux/flutter/generated_plugins.cmake
@@ -0,0 +1,25 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+  audioplayers_linux
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+  jni
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)
diff --git a/app/linux/runner/CMakeLists.txt b/app/linux/runner/CMakeLists.txt
new file mode 100644
index 0000000..e97dabc
--- /dev/null
+++ b/app/linux/runner/CMakeLists.txt
@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.13)
+project(runner LANGUAGES CXX)
+
+# Define the application target. To change its name, change BINARY_NAME in the
+# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer
+# work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add preprocessor definitions for the application ID.
+add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+
+# Add dependency libraries. Add any application-specific dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
diff --git a/app/linux/runner/main.cc b/app/linux/runner/main.cc
new file mode 100644
index 0000000..e7c5c54
--- /dev/null
+++ b/app/linux/runner/main.cc
@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}
diff --git a/app/linux/runner/my_application.cc b/app/linux/runner/my_application.cc
new file mode 100644
index 0000000..cb0b6ab
--- /dev/null
+++ b/app/linux/runner/my_application.cc
@@ -0,0 +1,148 @@
+#include "my_application.h"
+
+#include <flutter_linux/flutter_linux.h>
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif
+
+#include "flutter/generated_plugin_registrant.h"
+
+struct _MyApplication {
+  GtkApplication parent_instance;
+  char** dart_entrypoint_arguments;
+};
+
+G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
+
+// Called when first Flutter frame received.
+static void first_frame_cb(MyApplication* self, FlView* view) {
+  gtk_widget_show(gtk_widget_get_toplevel(GTK_WIDGET(view)));
+}
+
+// Implements GApplication::activate.
+static void my_application_activate(GApplication* application) {
+  MyApplication* self = MY_APPLICATION(application);
+  GtkWindow* window =
+      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
+
+  // Use a header bar when running in GNOME as this is the common style used
+  // by applications and is the setup most users will be using (e.g. Ubuntu
+  // desktop).
+  // If running on X and not using GNOME then just use a traditional title bar
+  // in case the window manager does more exotic layout, e.g. tiling.
+  // If running on Wayland assume the header bar will work (may need changing
+  // if future cases occur).
+  gboolean use_header_bar = TRUE;
+#ifdef GDK_WINDOWING_X11
+  GdkScreen* screen = gtk_window_get_screen(window);
+  if (GDK_IS_X11_SCREEN(screen)) {
+    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
+    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
+      use_header_bar = FALSE;
+    }
+  }
+#endif
+  if (use_header_bar) {
+    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
+    gtk_widget_show(GTK_WIDGET(header_bar));
+    gtk_header_bar_set_title(header_bar, "iwbtc");
+    gtk_header_bar_set_show_close_button(header_bar, TRUE);
+    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
+  } else {
+    gtk_window_set_title(window, "iwbtc");
+  }
+
+  gtk_window_set_default_size(window, 1280, 720);
+
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+  fl_dart_project_set_dart_entrypoint_arguments(
+      project, self->dart_entrypoint_arguments);
+
+  FlView* view = fl_view_new(project);
+  GdkRGBA background_color;
+  // Background defaults to black, override it here if necessary, e.g. #00000000
+  // for transparent.
+  gdk_rgba_parse(&background_color, "#000000");
+  fl_view_set_background_color(view, &background_color);
+  gtk_widget_show(GTK_WIDGET(view));
+  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
+
+  // Show the window when Flutter renders.
+  // Requires the view to be realized so we can start rendering.
+  g_signal_connect_swapped(view, "first-frame", G_CALLBACK(first_frame_cb),
+                           self);
+  gtk_widget_realize(GTK_WIDGET(view));
+
+  fl_register_plugins(FL_PLUGIN_REGISTRY(view));
+
+  gtk_widget_grab_focus(GTK_WIDGET(view));
+}
+
+// Implements GApplication::local_command_line.
+static gboolean my_application_local_command_line(GApplication* application,
+                                                  gchar*** arguments,
+                                                  int* exit_status) {
+  MyApplication* self = MY_APPLICATION(application);
+  // Strip out the first argument as it is the binary name.
+  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
+
+  g_autoptr(GError) error = nullptr;
+  if (!g_application_register(application, nullptr, &error)) {
+    g_warning("Failed to register: %s", error->message);
+    *exit_status = 1;
+    return TRUE;
+  }
+
+  g_application_activate(application);
+  *exit_status = 0;
+
+  return TRUE;
+}
+
+// Implements GApplication::startup.
+static void my_application_startup(GApplication* application) {
+  // MyApplication* self = MY_APPLICATION(object);
+
+  // Perform any actions required at application startup.
+
+  G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
+}
+
+// Implements GApplication::shutdown.
+static void my_application_shutdown(GApplication* application) {
+  // MyApplication* self = MY_APPLICATION(object);
+
+  // Perform any actions required at application shutdown.
+
+  G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
+}
+
+// Implements GObject::dispose.
+static void my_application_dispose(GObject* object) {
+  MyApplication* self = MY_APPLICATION(object);
+  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
+  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
+}
+
+static void my_application_class_init(MyApplicationClass* klass) {
+  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
+  G_APPLICATION_CLASS(klass)->local_command_line =
+      my_application_local_command_line;
+  G_APPLICATION_CLASS(klass)->startup = my_application_startup;
+  G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
+  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
+}
+
+static void my_application_init(MyApplication* self) {}
+
+MyApplication* my_application_new() {
+  // Set the program name to the application ID, which helps various systems
+  // like GTK and desktop environments map this running application to its
+  // corresponding .desktop file. This ensures better integration by allowing
+  // the application to be recognized beyond its binary name.
+  g_set_prgname(APPLICATION_ID);
+
+  return MY_APPLICATION(g_object_new(my_application_get_type(),
+                                     "application-id", APPLICATION_ID, "flags",
+                                     G_APPLICATION_NON_UNIQUE, nullptr));
+}
diff --git a/app/linux/runner/my_application.h b/app/linux/runner/my_application.h
new file mode 100644
index 0000000..db16367
--- /dev/null
+++ b/app/linux/runner/my_application.h
@@ -0,0 +1,21 @@
+#ifndef FLUTTER_MY_APPLICATION_H_
+#define FLUTTER_MY_APPLICATION_H_
+
+#include <gtk/gtk.h>
+
+G_DECLARE_FINAL_TYPE(MyApplication,
+                     my_application,
+                     MY,
+                     APPLICATION,
+                     GtkApplication)
+
+/**
+ * my_application_new:
+ *
+ * Creates a new Flutter-based application.
+ *
+ * Returns: a new #MyApplication.
+ */
+MyApplication* my_application_new();
+
+#endif  // FLUTTER_MY_APPLICATION_H_
diff --git a/app/macos/.gitignore b/app/macos/.gitignore
new file mode 100644
index 0000000..746adbb
--- /dev/null
+++ b/app/macos/.gitignore
@@ -0,0 +1,7 @@
+# Flutter-related
+**/Flutter/ephemeral/
+**/Pods/
+
+# Xcode-related
+**/dgph
+**/xcuserdata/
diff --git a/app/macos/Flutter/Flutter-Debug.xcconfig b/app/macos/Flutter/Flutter-Debug.xcconfig
new file mode 100644
index 0000000..c2efd0b
--- /dev/null
+++ b/app/macos/Flutter/Flutter-Debug.xcconfig
@@ -0,0 +1 @@
+#include "ephemeral/Flutter-Generated.xcconfig"
diff --git a/app/macos/Flutter/Flutter-Release.xcconfig b/app/macos/Flutter/Flutter-Release.xcconfig
new file mode 100644
index 0000000..c2efd0b
--- /dev/null
+++ b/app/macos/Flutter/Flutter-Release.xcconfig
@@ -0,0 +1 @@
+#include "ephemeral/Flutter-Generated.xcconfig"
diff --git a/app/macos/Flutter/GeneratedPluginRegistrant.swift b/app/macos/Flutter/GeneratedPluginRegistrant.swift
new file mode 100644
index 0000000..5d79b0b
--- /dev/null
+++ b/app/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -0,0 +1,14 @@
+//
+//  Generated file. Do not edit.
+//
+
+import FlutterMacOS
+import Foundation
+
+import audioplayers_darwin
+import shared_preferences_foundation
+
+func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  AudioplayersDarwinPlugin.register(with: registry.registrar(forPlugin: "AudioplayersDarwinPlugin"))
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
+}
diff --git a/app/macos/Runner.xcodeproj/project.pbxproj b/app/macos/Runner.xcodeproj/project.pbxproj
new file mode 100644
index 0000000..d19c8bf
--- /dev/null
+++ b/app/macos/Runner.xcodeproj/project.pbxproj
@@ -0,0 +1,729 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXAggregateTarget section */
+		33CC111A2044C6BA0003C045 /* Flutter Assemble */ = {
+			isa = PBXAggregateTarget;
+			buildConfigurationList = 33CC111B2044C6BA0003C045 /* Build configuration list for PBXAggregateTarget "Flutter Assemble" */;
+			buildPhases = (
+				33CC111E2044C6BF0003C045 /* ShellScript */,
+			);
+			dependencies = (
+			);
+			name = "Flutter Assemble";
+			productName = FLX;
+		};
+/* End PBXAggregateTarget section */
+
+/* Begin PBXBuildFile section */
+		331C80D8294CF71000263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C80D7294CF71000263BE5 /* RunnerTests.swift */; };
+		335BBD1B22A9A15E00E9071D /* GeneratedPluginRegistrant.swift in Sources */ = {isa = PBXBuildFile; fileRef = 335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */; };
+		33CC10F12044A3C60003C045 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC10F02044A3C60003C045 /* AppDelegate.swift */; };
+		33CC10F32044A3C60003C045 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F22044A3C60003C045 /* Assets.xcassets */; };
+		33CC10F62044A3C60003C045 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F42044A3C60003C045 /* MainMenu.xib */; };
+		33CC11132044BFA00003C045 /* MainFlutterWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC11122044BFA00003C045 /* MainFlutterWindow.swift */; };
+		78A318202AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage in Frameworks */ = {isa = PBXBuildFile; productRef = 78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		331C80D9294CF71000263BE5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 33CC10EC2044A3C60003C045;
+			remoteInfo = Runner;
+		};
+		33CC111F2044C79F0003C045 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 33CC111A2044C6BA0003C045;
+			remoteInfo = FLX;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		33CC110E2044A8840003C045 /* Bundle Framework */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Bundle Framework";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		331C80D5294CF71000263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		331C80D7294CF71000263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
+		333000ED22D3DE5D00554162 /* Warnings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Warnings.xcconfig; sourceTree = "<group>"; };
+		335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GeneratedPluginRegistrant.swift; sourceTree = "<group>"; };
+		33CC10ED2044A3C60003C045 /* iwbtc.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "iwbtc.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+		33CC10F02044A3C60003C045 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
+		33CC10F22044A3C60003C045 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; name = Assets.xcassets; path = Runner/Assets.xcassets; sourceTree = "<group>"; };
+		33CC10F52044A3C60003C045 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/MainMenu.xib; sourceTree = "<group>"; };
+		33CC10F72044A3C60003C045 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; name = Info.plist; path = Runner/Info.plist; sourceTree = "<group>"; };
+		33CC11122044BFA00003C045 /* MainFlutterWindow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MainFlutterWindow.swift; sourceTree = "<group>"; };
+		33CEB47222A05771004F2AC0 /* Flutter-Debug.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = "Flutter-Debug.xcconfig"; sourceTree = "<group>"; };
+		33CEB47422A05771004F2AC0 /* Flutter-Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = "Flutter-Release.xcconfig"; sourceTree = "<group>"; };
+		33CEB47722A0578A004F2AC0 /* Flutter-Generated.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = "Flutter-Generated.xcconfig"; path = "ephemeral/Flutter-Generated.xcconfig"; sourceTree = "<group>"; };
+		33E51913231747F40026EE4D /* DebugProfile.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = DebugProfile.entitlements; sourceTree = "<group>"; };
+		33E51914231749380026EE4D /* Release.entitlements */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.entitlements; path = Release.entitlements; sourceTree = "<group>"; };
+		33E5194F232828860026EE4D /* AppInfo.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = AppInfo.xcconfig; sourceTree = "<group>"; };
+		78E0A7A72DC9AD7400C4905E /* FlutterGeneratedPluginSwiftPackage */ = {isa = PBXFileReference; lastKnownFileType = wrapper; name = FlutterGeneratedPluginSwiftPackage; path = ephemeral/Packages/FlutterGeneratedPluginSwiftPackage; sourceTree = "<group>"; };
+		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Release.xcconfig; sourceTree = "<group>"; };
+		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = Debug.xcconfig; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		331C80D2294CF70F00263BE5 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		33CC10EA2044A3C60003C045 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				78A318202AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		331C80D6294CF71000263BE5 /* RunnerTests */ = {
+			isa = PBXGroup;
+			children = (
+				331C80D7294CF71000263BE5 /* RunnerTests.swift */,
+			);
+			path = RunnerTests;
+			sourceTree = "<group>";
+		};
+		33BA886A226E78AF003329D5 /* Configs */ = {
+			isa = PBXGroup;
+			children = (
+				33E5194F232828860026EE4D /* AppInfo.xcconfig */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				333000ED22D3DE5D00554162 /* Warnings.xcconfig */,
+			);
+			path = Configs;
+			sourceTree = "<group>";
+		};
+		33CC10E42044A3C60003C045 = {
+			isa = PBXGroup;
+			children = (
+				33FAB671232836740065AC1E /* Runner */,
+				33CEB47122A05771004F2AC0 /* Flutter */,
+				331C80D6294CF71000263BE5 /* RunnerTests */,
+				33CC10EE2044A3C60003C045 /* Products */,
+				D73912EC22F37F3D000D13A0 /* Frameworks */,
+			);
+			sourceTree = "<group>";
+		};
+		33CC10EE2044A3C60003C045 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				33CC10ED2044A3C60003C045 /* iwbtc.app */,
+				331C80D5294CF71000263BE5 /* RunnerTests.xctest */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		33CC11242044D66E0003C045 /* Resources */ = {
+			isa = PBXGroup;
+			children = (
+				33CC10F22044A3C60003C045 /* Assets.xcassets */,
+				33CC10F42044A3C60003C045 /* MainMenu.xib */,
+				33CC10F72044A3C60003C045 /* Info.plist */,
+			);
+			name = Resources;
+			path = ..;
+			sourceTree = "<group>";
+		};
+		33CEB47122A05771004F2AC0 /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
+				78E0A7A72DC9AD7400C4905E /* FlutterGeneratedPluginSwiftPackage */,
+				335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */,
+				33CEB47222A05771004F2AC0 /* Flutter-Debug.xcconfig */,
+				33CEB47422A05771004F2AC0 /* Flutter-Release.xcconfig */,
+				33CEB47722A0578A004F2AC0 /* Flutter-Generated.xcconfig */,
+			);
+			path = Flutter;
+			sourceTree = "<group>";
+		};
+		33FAB671232836740065AC1E /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				33CC10F02044A3C60003C045 /* AppDelegate.swift */,
+				33CC11122044BFA00003C045 /* MainFlutterWindow.swift */,
+				33E51913231747F40026EE4D /* DebugProfile.entitlements */,
+				33E51914231749380026EE4D /* Release.entitlements */,
+				33CC11242044D66E0003C045 /* Resources */,
+				33BA886A226E78AF003329D5 /* Configs */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+		D73912EC22F37F3D000D13A0 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		331C80D4294CF70F00263BE5 /* RunnerTests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 331C80DE294CF71000263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
+			buildPhases = (
+				331C80D1294CF70F00263BE5 /* Sources */,
+				331C80D2294CF70F00263BE5 /* Frameworks */,
+				331C80D3294CF70F00263BE5 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				331C80DA294CF71000263BE5 /* PBXTargetDependency */,
+			);
+			name = RunnerTests;
+			productName = RunnerTests;
+			productReference = 331C80D5294CF71000263BE5 /* RunnerTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
+		33CC10EC2044A3C60003C045 /* Runner */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 33CC10FB2044A3C60003C045 /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
+				33CC10E92044A3C60003C045 /* Sources */,
+				33CC10EA2044A3C60003C045 /* Frameworks */,
+				33CC10EB2044A3C60003C045 /* Resources */,
+				33CC110E2044A8840003C045 /* Bundle Framework */,
+				3399D490228B24CF009A79C7 /* ShellScript */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				33CC11202044C79F0003C045 /* PBXTargetDependency */,
+			);
+			name = Runner;
+			packageProductDependencies = (
+				78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */,
+			);
+			productName = Runner;
+			productReference = 33CC10ED2044A3C60003C045 /* iwbtc.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		33CC10E52044A3C60003C045 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = YES;
+				LastSwiftUpdateCheck = 0920;
+				LastUpgradeCheck = 1510;
+				ORGANIZATIONNAME = "";
+				TargetAttributes = {
+					331C80D4294CF70F00263BE5 = {
+						CreatedOnToolsVersion = 14.0;
+						TestTargetID = 33CC10EC2044A3C60003C045;
+					};
+					33CC10EC2044A3C60003C045 = {
+						CreatedOnToolsVersion = 9.2;
+						LastSwiftMigration = 1100;
+						ProvisioningStyle = Automatic;
+						SystemCapabilities = {
+							com.apple.Sandbox = {
+								enabled = 1;
+							};
+						};
+					};
+					33CC111A2044C6BA0003C045 = {
+						CreatedOnToolsVersion = 9.2;
+						ProvisioningStyle = Manual;
+					};
+				};
+			};
+			buildConfigurationList = 33CC10E82044A3C60003C045 /* Build configuration list for PBXProject "Runner" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+			);
+			mainGroup = 33CC10E42044A3C60003C045;
+			packageReferences = (
+				781AD8BC2B33823900A9FFBB /* XCLocalSwiftPackageReference "Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage" */,
+			);
+			productRefGroup = 33CC10EE2044A3C60003C045 /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				33CC10EC2044A3C60003C045 /* Runner */,
+				331C80D4294CF70F00263BE5 /* RunnerTests */,
+				33CC111A2044C6BA0003C045 /* Flutter Assemble */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		331C80D3294CF70F00263BE5 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		33CC10EB2044A3C60003C045 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				33CC10F32044A3C60003C045 /* Assets.xcassets in Resources */,
+				33CC10F62044A3C60003C045 /* MainMenu.xib in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		3399D490228B24CF009A79C7 /* ShellScript */ = {
+			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "echo \"$PRODUCT_NAME.app\" > \"$PROJECT_DIR\"/Flutter/ephemeral/.app_filename && \"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh embed\n";
+		};
+		33CC111E2044C6BF0003C045 /* ShellScript */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				Flutter/ephemeral/FlutterInputs.xcfilelist,
+			);
+			inputPaths = (
+				Flutter/ephemeral/tripwire,
+			);
+			outputFileListPaths = (
+				Flutter/ephemeral/FlutterOutputs.xcfilelist,
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh && touch Flutter/ephemeral/tripwire";
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		331C80D1294CF70F00263BE5 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				331C80D8294CF71000263BE5 /* RunnerTests.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		33CC10E92044A3C60003C045 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				33CC11132044BFA00003C045 /* MainFlutterWindow.swift in Sources */,
+				33CC10F12044A3C60003C045 /* AppDelegate.swift in Sources */,
+				335BBD1B22A9A15E00E9071D /* GeneratedPluginRegistrant.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXTargetDependency section */
+		331C80DA294CF71000263BE5 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 33CC10EC2044A3C60003C045 /* Runner */;
+			targetProxy = 331C80D9294CF71000263BE5 /* PBXContainerItemProxy */;
+		};
+		33CC11202044C79F0003C045 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 33CC111A2044C6BA0003C045 /* Flutter Assemble */;
+			targetProxy = 33CC111F2044C79F0003C045 /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
+/* Begin PBXVariantGroup section */
+		33CC10F42044A3C60003C045 /* MainMenu.xib */ = {
+			isa = PBXVariantGroup;
+			children = (
+				33CC10F52044A3C60003C045 /* Base */,
+			);
+			name = MainMenu.xib;
+			path = Runner;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
+/* Begin XCBuildConfiguration section */
+		331C80DB294CF71000263BE5 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.iwbtc.iwbtc.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/iwbtc.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/iwbtc";
+			};
+			name = Debug;
+		};
+		331C80DC294CF71000263BE5 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.iwbtc.iwbtc.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/iwbtc.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/iwbtc";
+			};
+			name = Release;
+		};
+		331C80DD294CF71000263BE5 /* Profile */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.iwbtc.iwbtc.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/iwbtc.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/iwbtc";
+			};
+			name = Profile;
+		};
+		338D0CE9231458BD00FA5F75 /* Profile */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
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+				MTL_ENABLE_DEBUG_INFO = NO;
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+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
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+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CODE_SIGN_IDENTITY = "-";
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+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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+				GCC_WARN_UNUSED_VARIABLE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = macosx;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
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+			name = Release;
+		};
+		33CC10FC2044A3C60003C045 /* Debug */ = {
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+			baseConfigurationReference = 33E5194F232828860026EE4D /* AppInfo.xcconfig */;
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+				COMBINE_HIDPI_IMAGES = YES;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+				);
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+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
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+			name = Debug;
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+			baseConfigurationReference = 33E5194F232828860026EE4D /* AppInfo.xcconfig */;
+			buildSettings = {
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+				CODE_SIGN_STYLE = Automatic;
+				COMBINE_HIDPI_IMAGES = YES;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+				);
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+			};
+			name = Release;
+		};
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+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CODE_SIGN_STYLE = Manual;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+			};
+			name = Debug;
+		};
+		33CC111D2044C6BA0003C045 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CODE_SIGN_STYLE = Automatic;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		331C80DE294CF71000263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				331C80DB294CF71000263BE5 /* Debug */,
+				331C80DC294CF71000263BE5 /* Release */,
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+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		33CC10E82044A3C60003C045 /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				33CC10F92044A3C60003C045 /* Debug */,
+				33CC10FA2044A3C60003C045 /* Release */,
+				338D0CE9231458BD00FA5F75 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		33CC10FB2044A3C60003C045 /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				33CC10FC2044A3C60003C045 /* Debug */,
+				33CC10FD2044A3C60003C045 /* Release */,
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+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		33CC111B2044C6BA0003C045 /* Build configuration list for PBXAggregateTarget "Flutter Assemble" */ = {
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+			buildConfigurations = (
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+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+
+/* Begin XCLocalSwiftPackageReference section */
+		781AD8BC2B33823900A9FFBB /* XCLocalSwiftPackageReference "Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage" */ = {
+			isa = XCLocalSwiftPackageReference;
+			relativePath = Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage;
+		};
+/* End XCLocalSwiftPackageReference section */
+
+/* Begin XCSwiftPackageProductDependency section */
+		78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = FlutterGeneratedPluginSwiftPackage;
+		};
+/* End XCSwiftPackageProductDependency section */
+	};
+	rootObject = 33CC10E52044A3C60003C045 /* Project object */;
+}
diff --git a/app/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/app/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/app/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/app/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/app/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
new file mode 100644
index 0000000..1a26f1c
--- /dev/null
+++ b/app/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1510"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <PreActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "Run Prepare Flutter Framework Script"
+               scriptText = "&quot;$FLUTTER_ROOT&quot;/packages/flutter_tools/bin/macos_assemble.sh prepare&#10;">
+               <EnvironmentBuildable>
+                  <BuildableReference
+                     BuildableIdentifier = "primary"
+                     BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+                     BuildableName = "iwbtc.app"
+                     BlueprintName = "Runner"
+                     ReferencedContainer = "container:Runner.xcodeproj">
+                  </BuildableReference>
+               </EnvironmentBuildable>
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+               BuildableName = "iwbtc.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+            BuildableName = "iwbtc.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C80D4294CF70F00263BE5"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      enableGPUValidationMode = "1"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+            BuildableName = "iwbtc.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+            BuildableName = "iwbtc.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/app/macos/Runner.xcworkspace/contents.xcworkspacedata b/app/macos/Runner.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..1d526a1
--- /dev/null
+++ b/app/macos/Runner.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>
diff --git a/app/macos/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/app/macos/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/app/macos/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/app/macos/Runner/AppDelegate.swift b/app/macos/Runner/AppDelegate.swift
new file mode 100644
index 0000000..b3c1761
--- /dev/null
+++ b/app/macos/Runner/AppDelegate.swift
@@ -0,0 +1,13 @@
+import Cocoa
+import FlutterMacOS
+
+@main
+class AppDelegate: FlutterAppDelegate {
+  override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+    return true
+  }
+
+  override func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
+    return true
+  }
+}
diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
new file mode 100644
index 0000000..a2ec33f
--- /dev/null
+++ b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,68 @@
+{
+  "images" : [
+    {
+      "size" : "16x16",
+      "idiom" : "mac",
+      "filename" : "app_icon_16.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "16x16",
+      "idiom" : "mac",
+      "filename" : "app_icon_32.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "32x32",
+      "idiom" : "mac",
+      "filename" : "app_icon_32.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "32x32",
+      "idiom" : "mac",
+      "filename" : "app_icon_64.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "128x128",
+      "idiom" : "mac",
+      "filename" : "app_icon_128.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "128x128",
+      "idiom" : "mac",
+      "filename" : "app_icon_256.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "256x256",
+      "idiom" : "mac",
+      "filename" : "app_icon_256.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "256x256",
+      "idiom" : "mac",
+      "filename" : "app_icon_512.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "512x512",
+      "idiom" : "mac",
+      "filename" : "app_icon_512.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "512x512",
+      "idiom" : "mac",
+      "filename" : "app_icon_1024.png",
+      "scale" : "2x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png
new file mode 100644
index 0000000..82b6f9d
Binary files /dev/null and b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png differ
diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png
new file mode 100644
index 0000000..13b35eb
Binary files /dev/null and b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png differ
diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_16.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_16.png
new file mode 100644
index 0000000..0a3f5fa
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diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_256.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_256.png
new file mode 100644
index 0000000..bdb5722
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diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_32.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_32.png
new file mode 100644
index 0000000..f083318
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diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png
new file mode 100644
index 0000000..326c0e7
Binary files /dev/null and b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png differ
diff --git a/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_64.png b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_64.png
new file mode 100644
index 0000000..2f1632c
Binary files /dev/null and b/app/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_64.png differ
diff --git a/app/macos/Runner/Base.lproj/MainMenu.xib b/app/macos/Runner/Base.lproj/MainMenu.xib
new file mode 100644
index 0000000..80e867a
--- /dev/null
+++ b/app/macos/Runner/Base.lproj/MainMenu.xib
@@ -0,0 +1,343 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+    <dependencies>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14490.70"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <customObject id="-2" userLabel="File's Owner" customClass="NSApplication">
+            <connections>
+                <outlet property="delegate" destination="Voe-Tx-rLC" id="GzC-gU-4Uq"/>
+            </connections>
+        </customObject>
+        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
+        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
+        <customObject id="Voe-Tx-rLC" customClass="AppDelegate" customModule="Runner" customModuleProvider="target">
+            <connections>
+                <outlet property="applicationMenu" destination="uQy-DD-JDr" id="XBo-yE-nKs"/>
+                <outlet property="mainFlutterWindow" destination="QvC-M9-y7g" id="gIp-Ho-8D9"/>
+            </connections>
+        </customObject>
+        <customObject id="YLy-65-1bz" customClass="NSFontManager"/>
+        <menu title="Main Menu" systemMenu="main" id="AYu-sK-qS6">
+            <items>
+                <menuItem title="APP_NAME" id="1Xt-HY-uBw">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="APP_NAME" systemMenu="apple" id="uQy-DD-JDr">
+                        <items>
+                            <menuItem title="About APP_NAME" id="5kV-Vb-QxS">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="orderFrontStandardAboutPanel:" target="-1" id="Exp-CZ-Vem"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="VOq-y0-SEH"/>
+                            <menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW"/>
+                            <menuItem isSeparatorItem="YES" id="wFC-TO-SCJ"/>
+                            <menuItem title="Services" id="NMo-om-nkz">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Services" systemMenu="services" id="hz9-B4-Xy5"/>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="4je-JR-u6R"/>
+                            <menuItem title="Hide APP_NAME" keyEquivalent="h" id="Olw-nP-bQN">
+                                <connections>
+                                    <action selector="hide:" target="-1" id="PnN-Uc-m68"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Hide Others" keyEquivalent="h" id="Vdr-fp-XzO">
+                                <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                <connections>
+                                    <action selector="hideOtherApplications:" target="-1" id="VT4-aY-XCT"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Show All" id="Kd2-mp-pUS">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="unhideAllApplications:" target="-1" id="Dhg-Le-xox"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="kCx-OE-vgT"/>
+                            <menuItem title="Quit APP_NAME" keyEquivalent="q" id="4sb-4s-VLi">
+                                <connections>
+                                    <action selector="terminate:" target="-1" id="Te7-pn-YzF"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Edit" id="5QF-Oa-p0T">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="Edit" id="W48-6f-4Dl">
+                        <items>
+                            <menuItem title="Undo" keyEquivalent="z" id="dRJ-4n-Yzg">
+                                <connections>
+                                    <action selector="undo:" target="-1" id="M6e-cu-g7V"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Redo" keyEquivalent="Z" id="6dh-zS-Vam">
+                                <connections>
+                                    <action selector="redo:" target="-1" id="oIA-Rs-6OD"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="WRV-NI-Exz"/>
+                            <menuItem title="Cut" keyEquivalent="x" id="uRl-iY-unG">
+                                <connections>
+                                    <action selector="cut:" target="-1" id="YJe-68-I9s"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Copy" keyEquivalent="c" id="x3v-GG-iWU">
+                                <connections>
+                                    <action selector="copy:" target="-1" id="G1f-GL-Joy"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Paste" keyEquivalent="v" id="gVA-U4-sdL">
+                                <connections>
+                                    <action selector="paste:" target="-1" id="UvS-8e-Qdg"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Paste and Match Style" keyEquivalent="V" id="WeT-3V-zwk">
+                                <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                <connections>
+                                    <action selector="pasteAsPlainText:" target="-1" id="cEh-KX-wJQ"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Delete" id="pa3-QI-u2k">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="delete:" target="-1" id="0Mk-Ml-PaM"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Select All" keyEquivalent="a" id="Ruw-6m-B2m">
+                                <connections>
+                                    <action selector="selectAll:" target="-1" id="VNm-Mi-diN"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="uyl-h8-XO2"/>
+                            <menuItem title="Find" id="4EN-yA-p0u">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Find" id="1b7-l0-nxx">
+                                    <items>
+                                        <menuItem title="Find…" tag="1" keyEquivalent="f" id="Xz5-n4-O0W">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="cD7-Qs-BN4"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find and Replace…" tag="12" keyEquivalent="f" id="YEy-JH-Tfz">
+                                            <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="WD3-Gg-5AJ"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find Next" tag="2" keyEquivalent="g" id="q09-fT-Sye">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="NDo-RZ-v9R"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find Previous" tag="3" keyEquivalent="G" id="OwM-mh-QMV">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="HOh-sY-3ay"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Use Selection for Find" tag="7" keyEquivalent="e" id="buJ-ug-pKt">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="U76-nv-p5D"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Jump to Selection" keyEquivalent="j" id="S0p-oC-mLd">
+                                            <connections>
+                                                <action selector="centerSelectionInVisibleArea:" target="-1" id="IOG-6D-g5B"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Spelling and Grammar" id="Dv1-io-Yv7">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Spelling" id="3IN-sU-3Bg">
+                                    <items>
+                                        <menuItem title="Show Spelling and Grammar" keyEquivalent=":" id="HFo-cy-zxI">
+                                            <connections>
+                                                <action selector="showGuessPanel:" target="-1" id="vFj-Ks-hy3"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Document Now" keyEquivalent=";" id="hz2-CU-CR7">
+                                            <connections>
+                                                <action selector="checkSpelling:" target="-1" id="fz7-VC-reM"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem isSeparatorItem="YES" id="bNw-od-mp5"/>
+                                        <menuItem title="Check Spelling While Typing" id="rbD-Rh-wIN">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleContinuousSpellChecking:" target="-1" id="7w6-Qz-0kB"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Grammar With Spelling" id="mK6-2p-4JG">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleGrammarChecking:" target="-1" id="muD-Qn-j4w"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Correct Spelling Automatically" id="78Y-hA-62v">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticSpellingCorrection:" target="-1" id="2lM-Qi-WAP"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Substitutions" id="9ic-FL-obx">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Substitutions" id="FeM-D8-WVr">
+                                    <items>
+                                        <menuItem title="Show Substitutions" id="z6F-FW-3nz">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="orderFrontSubstitutionsPanel:" target="-1" id="oku-mr-iSq"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem isSeparatorItem="YES" id="gPx-C9-uUO"/>
+                                        <menuItem title="Smart Copy/Paste" id="9yt-4B-nSM">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleSmartInsertDelete:" target="-1" id="3IJ-Se-DZD"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Quotes" id="hQb-2v-fYv">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticQuoteSubstitution:" target="-1" id="ptq-xd-QOA"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Dashes" id="rgM-f4-ycn">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticDashSubstitution:" target="-1" id="oCt-pO-9gS"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Links" id="cwL-P1-jid">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticLinkDetection:" target="-1" id="Gip-E3-Fov"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Data Detectors" id="tRr-pd-1PS">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticDataDetection:" target="-1" id="R1I-Nq-Kbl"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Text Replacement" id="HFQ-gK-NFA">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticTextReplacement:" target="-1" id="DvP-Fe-Py6"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Transformations" id="2oI-Rn-ZJC">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Transformations" id="c8a-y6-VQd">
+                                    <items>
+                                        <menuItem title="Make Upper Case" id="vmV-6d-7jI">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="uppercaseWord:" target="-1" id="sPh-Tk-edu"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Make Lower Case" id="d9M-CD-aMd">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="lowercaseWord:" target="-1" id="iUZ-b5-hil"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Capitalize" id="UEZ-Bs-lqG">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="capitalizeWord:" target="-1" id="26H-TL-nsh"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Speech" id="xrE-MZ-jX0">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Speech" id="3rS-ZA-NoH">
+                                    <items>
+                                        <menuItem title="Start Speaking" id="Ynk-f8-cLZ">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="startSpeaking:" target="-1" id="654-Ng-kyl"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Stop Speaking" id="Oyz-dy-DGm">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="stopSpeaking:" target="-1" id="dX8-6p-jy9"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="View" id="H8h-7b-M4v">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="View" id="HyV-fh-RgO">
+                        <items>
+                            <menuItem title="Enter Full Screen" keyEquivalent="f" id="4J7-dP-txa">
+                                <modifierMask key="keyEquivalentModifierMask" control="YES" command="YES"/>
+                                <connections>
+                                    <action selector="toggleFullScreen:" target="-1" id="dU3-MA-1Rq"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Window" id="aUF-d1-5bR">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="Window" systemMenu="window" id="Td7-aD-5lo">
+                        <items>
+                            <menuItem title="Minimize" keyEquivalent="m" id="OY7-WF-poV">
+                                <connections>
+                                    <action selector="performMiniaturize:" target="-1" id="VwT-WD-YPe"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Zoom" id="R4o-n2-Eq4">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="performZoom:" target="-1" id="DIl-cC-cCs"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="eu3-7i-yIM"/>
+                            <menuItem title="Bring All to Front" id="LE2-aR-0XJ">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="arrangeInFront:" target="-1" id="DRN-fu-gQh"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Help" id="EPT-qC-fAb">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="Help" systemMenu="help" id="rJ0-wn-3NY"/>
+                </menuItem>
+            </items>
+            <point key="canvasLocation" x="142" y="-258"/>
+        </menu>
+        <window title="APP_NAME" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" animationBehavior="default" id="QvC-M9-y7g" customClass="MainFlutterWindow" customModule="Runner" customModuleProvider="target">
+            <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
+            <rect key="contentRect" x="335" y="390" width="800" height="600"/>
+            <rect key="screenRect" x="0.0" y="0.0" width="2560" height="1577"/>
+            <view key="contentView" wantsLayer="YES" id="EiT-Mj-1SZ">
+                <rect key="frame" x="0.0" y="0.0" width="800" height="600"/>
+                <autoresizingMask key="autoresizingMask"/>
+            </view>
+        </window>
+    </objects>
+</document>
diff --git a/app/macos/Runner/Configs/AppInfo.xcconfig b/app/macos/Runner/Configs/AppInfo.xcconfig
new file mode 100644
index 0000000..b78c294
--- /dev/null
+++ b/app/macos/Runner/Configs/AppInfo.xcconfig
@@ -0,0 +1,14 @@
+// Application-level settings for the Runner target.
+//
+// This may be replaced with something auto-generated from metadata (e.g., pubspec.yaml) in the
+// future. If not, the values below would default to using the project name when this becomes a
+// 'flutter create' template.
+
+// The application's name. By default this is also the title of the Flutter window.
+PRODUCT_NAME = iwbtc
+
+// The application's bundle identifier
+PRODUCT_BUNDLE_IDENTIFIER = com.iwbtc.iwbtc
+
+// The copyright displayed in application information
+PRODUCT_COPYRIGHT = Copyright © 2026 com.iwbtc. All rights reserved.
diff --git a/app/macos/Runner/Configs/Debug.xcconfig b/app/macos/Runner/Configs/Debug.xcconfig
new file mode 100644
index 0000000..36b0fd9
--- /dev/null
+++ b/app/macos/Runner/Configs/Debug.xcconfig
@@ -0,0 +1,2 @@
+#include "../../Flutter/Flutter-Debug.xcconfig"
+#include "Warnings.xcconfig"
diff --git a/app/macos/Runner/Configs/Release.xcconfig b/app/macos/Runner/Configs/Release.xcconfig
new file mode 100644
index 0000000..dff4f49
--- /dev/null
+++ b/app/macos/Runner/Configs/Release.xcconfig
@@ -0,0 +1,2 @@
+#include "../../Flutter/Flutter-Release.xcconfig"
+#include "Warnings.xcconfig"
diff --git a/app/macos/Runner/Configs/Warnings.xcconfig b/app/macos/Runner/Configs/Warnings.xcconfig
new file mode 100644
index 0000000..42bcbf4
--- /dev/null
+++ b/app/macos/Runner/Configs/Warnings.xcconfig
@@ -0,0 +1,13 @@
+WARNING_CFLAGS = -Wall -Wconditional-uninitialized -Wnullable-to-nonnull-conversion -Wmissing-method-return-type -Woverlength-strings
+GCC_WARN_UNDECLARED_SELECTOR = YES
+CLANG_UNDEFINED_BEHAVIOR_SANITIZER_NULLABILITY = YES
+CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE
+CLANG_WARN__DUPLICATE_METHOD_MATCH = YES
+CLANG_WARN_PRAGMA_PACK = YES
+CLANG_WARN_STRICT_PROTOTYPES = YES
+CLANG_WARN_COMMA = YES
+GCC_WARN_STRICT_SELECTOR_MATCH = YES
+CLANG_WARN_OBJC_REPEATED_USE_OF_WEAK = YES
+CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES
+GCC_WARN_SHADOW = YES
+CLANG_WARN_UNREACHABLE_CODE = YES
diff --git a/app/macos/Runner/DebugProfile.entitlements b/app/macos/Runner/DebugProfile.entitlements
new file mode 100644
index 0000000..dddb8a3
--- /dev/null
+++ b/app/macos/Runner/DebugProfile.entitlements
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.cs.allow-jit</key>
+	<true/>
+	<key>com.apple.security.network.server</key>
+	<true/>
+</dict>
+</plist>
diff --git a/app/macos/Runner/Info.plist b/app/macos/Runner/Info.plist
new file mode 100644
index 0000000..4789daa
--- /dev/null
+++ b/app/macos/Runner/Info.plist
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>$(PRODUCT_COPYRIGHT)</string>
+	<key>NSMainNibFile</key>
+	<string>MainMenu</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+</dict>
+</plist>
diff --git a/app/macos/Runner/MainFlutterWindow.swift b/app/macos/Runner/MainFlutterWindow.swift
new file mode 100644
index 0000000..3cc05eb
--- /dev/null
+++ b/app/macos/Runner/MainFlutterWindow.swift
@@ -0,0 +1,15 @@
+import Cocoa
+import FlutterMacOS
+
+class MainFlutterWindow: NSWindow {
+  override func awakeFromNib() {
+    let flutterViewController = FlutterViewController()
+    let windowFrame = self.frame
+    self.contentViewController = flutterViewController
+    self.setFrame(windowFrame, display: true)
+
+    RegisterGeneratedPlugins(registry: flutterViewController)
+
+    super.awakeFromNib()
+  }
+}
diff --git a/app/macos/Runner/Release.entitlements b/app/macos/Runner/Release.entitlements
new file mode 100644
index 0000000..852fa1a
--- /dev/null
+++ b/app/macos/Runner/Release.entitlements
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+</dict>
+</plist>
diff --git a/app/macos/RunnerTests/RunnerTests.swift b/app/macos/RunnerTests/RunnerTests.swift
new file mode 100644
index 0000000..61f3bd1
--- /dev/null
+++ b/app/macos/RunnerTests/RunnerTests.swift
@@ -0,0 +1,12 @@
+import Cocoa
+import FlutterMacOS
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}
diff --git a/app/pubspec.lock b/app/pubspec.lock
new file mode 100644
index 0000000..0395d16
--- /dev/null
+++ b/app/pubspec.lock
@@ -0,0 +1,594 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: d0481093c50b1da8910eb0bb301626d4d8eb7284aa739614d2b394ee09e3ea04
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.7.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.13.1"
+  audioplayers:
+    dependency: "direct main"
+    description:
+      name: audioplayers
+      sha256: "2ba4bb2944baacbdd5372ff8254a8e7feb8c10d7739545e392f5605a8f618745"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.8.1"
+  audioplayers_android:
+    dependency: transitive
+    description:
+      name: audioplayers_android
+      sha256: f5ff5b15620fbab8cb0849e9636c48e2b96c3f0f71723bbbe2ad3c761b205f05
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "5.3.0"
+  audioplayers_darwin:
+    dependency: transitive
+    description:
+      name: audioplayers_darwin
+      sha256: "1ca553add991384ecf421b9569da850f3ab2472ffb83f6970b0416365abc51be"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.5.0"
+  audioplayers_linux:
+    dependency: transitive
+    description:
+      name: audioplayers_linux
+      sha256: "15178b726b7cdee5364d0463c8d445630c4e0fb7d26612b73c767e7d25de9417"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.3.0"
+  audioplayers_platform_interface:
+    dependency: transitive
+    description:
+      name: audioplayers_platform_interface
+      sha256: "765f6f0e6dca55cb471c9483fc77700564b3484d19198aca4ebb5147c6c85acb"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "7.2.0"
+  audioplayers_web:
+    dependency: transitive
+    description:
+      name: audioplayers_web
+      sha256: ae1e0103c865a03e273f6d13d97b93f5595eac09915729cd5e37ef96e2857319
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "5.3.0"
+  audioplayers_windows:
+    dependency: transitive
+    description:
+      name: audioplayers_windows
+      sha256: a70ae82bba2dfcb6eb03dd4815d737a2d46d33ea5a96a03f535cfcaac490e413
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.4.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.2"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      sha256: faf38497bda5ead2a8c7615f4f7939df04333478bf32e4173fcb06d428b5716b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      sha256: fddb70d9b5277016c77a80201021d40a2247104d9f4aa7bab7157b7e3f05b84b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.2"
+  code_assets:
+    dependency: transitive
+    description:
+      name: code_assets
+      sha256: bf394f466ba9205f1812a0433b392d6af280f155f56651eda7c18cc32ed493b8
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.19.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.7"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      sha256: "41e005c33bd814be4d3096aff55b1908d419fde52ca656c8c47719ec745873cd"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.9"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      sha256: "5368f224a74523e8d2e7399ea1638b37aecfca824a3cc4dfdf77bf1fa905ac44"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.3"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "6d7fd89431262d8f3125e81b50d3847a091d846eafcd4fdb88dd06f36d705a45"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.0"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "7.0.1"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: b6dc7065e46c974bc7c5f143080a6764ec7a4be6da1285ececdc37be96de53be
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.1"
+  flame:
+    dependency: "direct main"
+    description:
+      name: flame
+      sha256: b4d7e59b81f35a426f8b39dcec10175180b9c2984b2b2e619021660d8951307c
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.38.2"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      sha256: "3105dc8492f6183fb076ccf1f351ac3d60564bff92e20bfc4af9cc1651f4e7e1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  hooks:
+    dependency: transitive
+    description:
+      name: hooks
+      sha256: "9a62a50b50b769a737bc0a8ff381f333529df3ab746b2f6b02e83760231455ba"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.2"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.6.0"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.1.2"
+  jni:
+    dependency: transitive
+    description:
+      name: jni
+      sha256: "6b9ca0602fef0230e83149afbe3f9f8227e94f2bbe84a1da4f14d699742f402d"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  jni_flutter:
+    dependency: transitive
+    description:
+      name: jni_flutter
+      sha256: "0dd33d67797560f66e961a6053882d4df54bd345bf063b8fe7ea133f7ad8b191"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.4+1"
+  jni_util:
+    dependency: transitive
+    description:
+      name: jni_util
+      sha256: "1ba86da04a5f2bf18fde2edb235587e70c5b0fc5bd4ba955f46b00942c3fc35f"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.0"
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "33e2e26bdd85a0112ec15400c8cbffea70d0f9c3407491f672a2fad47915e2de"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "11.0.2"
+  leak_tracker_flutter_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_flutter_testing
+      sha256: "1dbc140bb5a23c75ea9c4811222756104fbcd1a27173f0c34ca01e16bea473c1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.10"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: "8d5a2d49f4a66b49744b23b018848400d23e54caf9463f4eb20df3eb8acb2eb1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.2"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.1.0"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.12.19"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: "9c337007e82b1889149c82ed242ed1cb24a66044e30979c44912381e9be4c48b"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.13.0"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.18.0"
+  objective_c:
+    dependency: transitive
+    description:
+      name: objective_c
+      sha256: b7fb95a6d9a4f009edd63dc5ac69f07420b23a16161c6dd8660290b59c602e8e
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "9.5.0"
+  ordered_set:
+    dependency: transitive
+    description:
+      name: ordered_set
+      sha256: ca415a0e28b8e8f5e284af4b7d1b189d2d09af6d2082532ddaec54473f67d226
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "8.0.1"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: ffcf4cf3d6c0b74ac43708d9f56625506e8a68aa935abe9d267a7330f320eb5d
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.9.1"
+  path_provider:
+    dependency: transitive
+    description:
+      name: path_provider
+      sha256: a7f4874f987173da295a61c181b8ee71dab59b332a486b391babf26a1b884825
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.6"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: "69cbd515a62b94d32a7944f086b2f82b4ac40a1d45bebfc00813a430ab2dabcd"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.3.1"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "2a376b7d6392d80cd3705782d2caa734ca4727776db0b6ec36ef3f1855197699"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.6.0"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: "58c2005f147315b11e9b4a7bc889cd5203e250cba8e3f012dae259b4972b5c16"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.2"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "484838772624c3a4b94f1e44a3e19897fee738f2d5c4ce448443b0417f7c9dda"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.3"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.3.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: a36d119c13416516a7b5913fbe8af8531e11633d784c550b2125f76c758524ec
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.2.0"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.8"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "261236774e8b1d69cfc6b9eabbc96c40f25e7a2d6b171f3385d4f65d5734fb24"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.1"
+  record_use:
+    dependency: transitive
+    description:
+      name: record_use
+      sha256: "2551bd8eecfe95d14ae75f6021ad0248be5c27f138c2ec12fcb52b500b3ba1ed"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.6.0"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: "1e85e0dccf5b4a016077fea7dfbb4a7cb39c759ac1596fcf60c06deadb7da91f"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.5.6"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "593034a16e82953ca31145db6c85174286262715f9c5e6a9d8c65ffd9fcdce09"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.5.3"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "2ec3934efa51e46117f23031cc141b8fc878e8525b94ec1ea4f7f586cf1b47ea"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.5.7"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "649dc798a33931919ea356c4305c2d1f81619ea6e92244070b520187b5140ef9"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.1"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.10.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "8b27215b45d22309b5cddda1aa2b19bdfec9df0e765f2de506401c071d38d1b1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.12.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "969e04c80b8bcdf826f8f16579c7b14d780458bd97f56d107d3950fdbeef059d"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.4"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.1"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      sha256: b3d516dbd3757ff2a458735e4f6cbac9ff261f576f6e87bcb17feabb39e657c5
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.5.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.2"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.7.11"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.0"
+  uuid:
+    dependency: transitive
+    description:
+      name: uuid
+      sha256: "9b129329f58692f6e6578329498a8fe9fbe98f090beb764ffbb8ee2eadd01dcd"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.6.0"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      sha256: d530bd74fea330e6e364cda7a85019c434070188383e1cd8d9777ee586914c5b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: "89b11d62e1040ee681af3b4f1c97a803ecbf010c6e8b9c5896ee5b08c3bf7b78"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "15.4.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: f67cdd8e07d3c6329146aaef1ba043542b3134c12489f553ca9a7435d1068aea
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.4"
+sdks:
+  dart: ">=3.12.2 <4.0.0"
+  flutter: ">=3.44.0"
diff --git a/app/pubspec.yaml b/app/pubspec.yaml
new file mode 100644
index 0000000..60d17de
--- /dev/null
+++ b/app/pubspec.yaml
@@ -0,0 +1,98 @@
+name: iwbtc
+description: "A new Flutter project."
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+# In Windows, build-name is used as the major, minor, and patch parts
+# of the product and file versions while build-number is used as the build suffix.
+version: 1.0.0+1
+
+environment:
+  sdk: ^3.12.2
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.8
+
+  # 2D game engine: game loop, game widget, input, scaling.
+  flame: ^1.24.0
+  # Synthesized sound effects (we generate WAV buffers, no asset files).
+  audioplayers: ^6.4.0
+  # Local persistence (replaces web localStorage): cleared records + custom levels.
+  shared_preferences: ^2.5.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^6.0.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/to/resolution-aware-images
+  assets:
+    - assets/levels.json
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/to/asset-from-package
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/to/font-from-package
diff --git a/app/test/gameplay_test.dart b/app/test/gameplay_test.dart
new file mode 100644
index 0000000..0c78816
--- /dev/null
+++ b/app/test/gameplay_test.dart
@@ -0,0 +1,115 @@
+// 无头玩法测试：验证「输入 → World → 物理」链路真的在动（手感保真的核心）。
+// 不依赖 widget 树，直接用固定步长推进，与游戏内 world.tick 完全一致。
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:iwbtc/src/audio/sfx.dart' show Sfx;
+import 'package:iwbtc/src/core/input.dart' show Input;
+import 'package:iwbtc/src/core/save.dart' show Save;
+import 'package:iwbtc/src/game/levels.dart' show loadLevels, LEVELS;
+import 'package:iwbtc/src/game/world.dart' show GameHost, World;
+
+class _Host implements GameHost {
+  String screen = '';
+  String toast = '';
+  bool touchShown = false;
+  @override
+  void onBossBar(dynamic boss) {}
+  @override
+  void onHud(Map<String, dynamic> hud) {}
+  @override
+  void onPauseMenu(String label) {}
+  @override
+  void onResult(Map<String, dynamic> result) {}
+  @override
+  void onShowScreen(String s) => screen = s;
+  @override
+  void onToast(String text) => toast = text;
+  @override
+  void editorShow() {}
+  @override
+  void touchHide() => touchShown = false;
+  @override
+  void touchSetGun(bool has) {}
+  @override
+  void touchShow() => touchShown = true;
+}
+
+Future<World> _start() async {
+  SharedPreferences.setMockInitialValues(<String, Object>{});
+  await Save.load();
+  await loadLevels();
+  Input.clear();
+  Sfx.enabled = false; // 测试环境没有音频插件，保持静音（Sfx 也不会因此报错）
+  final world = World(_Host());
+  world.startLevel(LEVELS.first, 0);
+  return world;
+}
+
+/// 推进 n 个固定 60Hz 逻辑帧。
+void _step(World w, int n) {
+  for (int i = 0; i < n; i++) {
+    w.tick(17);
+  }
+}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  test('进入关卡后按方向键玩家会移动', () async {
+    final world = await _start();
+    expect(world.state, 'playing');
+    expect(world.player, isNotNull);
+
+    final double x0 = world.player!.x;
+    Input.onKey('ArrowRight', true);
+    _step(world, 15);
+    Input.onKey('ArrowRight', false);
+
+    expect(world.player!.x, greaterThan(x0), reason: '按住右键后玩家没有向右移动');
+    // 水平速度与 web 版一致（HSPD = 2.6）
+    expect(world.player!.vx, closeTo(2.6, 0.001));
+  });
+
+  test('跳跃初速与重力与 web 版一致（JUMP 6.6 / GRAV 0.25）', () async {
+    final world = await _start();
+    // 先落地，避免出生即空中导致二段跳语义不同
+    _step(world, 30);
+    final P = world.player!;
+    Input.onKey('ShiftLeft', true);
+    world.tick(17);
+    world.tick(17);
+    // 按住不放时持续受 GRAV = 0.25：-6.6 + 0.25 × 2
+    expect(P.vy, closeTo(-6.6 + 0.5, 0.001), reason: '上升重力不符');
+  });
+
+  test('松键即停：可变跳跃高度（与 web 版一致）', () async {
+    final world = await _start();
+    _step(world, 30);
+    final P = world.player!;
+    Input.onKey('ShiftLeft', true);
+    world.tick(17);
+    // 中途松开：web 版 player.js 会把 vy 收紧到 -3，再叠加一帧重力 → -2.75
+    Input.onKey('ShiftLeft', false);
+    world.tick(17);
+    expect(P.vy, closeTo(-3 + 0.25, 0.001), reason: '松键后的上升速度未按 -3 收紧');
+  });
+
+  test('死亡后不自动重生，按 R 才回存档点', () async {
+    final world = await _start();
+    final P = world.player!;
+    P.kill();
+    expect(P.dead, isTrue);
+    final double deadX = P.x;
+
+    Input.onKey('KeyR', false);
+    _step(world, 30);
+    expect(P.dead, isTrue, reason: '死亡后不应自动重生');
+    expect(P.x, deadX, reason: '死亡后玩家应定格在死亡点');
+
+    Input.onKey('KeyR', true);
+    world.tick(17);
+    Input.onKey('KeyR', false);
+    world.tick(17);
+    expect(P.dead, isFalse, reason: '按 R 后应重回存档点');
+    expect(world.deaths, 1);
+  });
+}
diff --git a/app/test/title_render_test.dart b/app/test/title_render_test.dart
new file mode 100644
index 0000000..556be3b
--- /dev/null
+++ b/app/test/title_render_test.dart
@@ -0,0 +1,337 @@
+// 真机冒烟测试：在虚拟设备尺寸下真实渲染界面。
+// 目的：验证 AppRoot 完成初始化后能正常出画面，而不是停在加载态/错误界面（黑屏）。
+// 任何 build / layout / paint 阶段的异常都会被测试捕获成失败。
+//
+// 关键回归点：Positioned 必须是 Stack 的**直接子级**。若把它写在 ValueListenableBuilder
+// 的返回值里（隔着一层），定位数据被丢弃、子树横向塌缩为 0 宽 —— 这正是真机黑屏的根因。
+// 因此这里断言的是「可见尺寸」，而不是「widget 存在」（find 不检查可见性，测不出塌缩）。
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:iwbtc/src/app_root.dart' show AppRoot;
+import 'package:iwbtc/src/core/app_error.dart' show AppError;
+import 'package:iwbtc/src/core/save.dart' show Save;
+import 'package:iwbtc/src/game/levels.dart' show loadLevels, LEVELS;
+import 'package:iwbtc/src/game/world.dart'
+    show GameHost, World, W, H;
+import 'package:iwbtc/src/ui/game_canvas.dart'
+    show GameCanvas, letterboxRect;
+import 'package:iwbtc/src/ui/overlays.dart' show HudOverlay;
+import 'package:iwbtc/src/ui/screens.dart' show SettingsScreen;
+import 'package:iwbtc/src/ui/touch_controls.dart' show TouchControls;
+
+/// 按典型**横屏手机**分辨率设定虚拟窗口（安卓端已锁定横屏）。
+const Size kLandscapePhone = Size(2340, 1080);
+
+/// 完成 AppRoot 初始化并出到稳定帧。
+Future<void> _boot(WidgetTester tester) async {
+  await tester.binding.setSurfaceSize(kLandscapePhone);
+  await tester.runAsync(() async {
+    await Save.load();
+    await loadLevels();
+  });
+  await tester.pumpWidget(const AppRoot());
+  await tester.pump();
+  await tester.pump(const Duration(milliseconds: 200));
+  await tester.pump();
+  expect(AppError.current.value, isNull, reason: '初始化/渲染过程中抛出了异常');
+}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() async {
+    AppError.current.value = null;
+    SharedPreferences.setMockInitialValues(<String, Object>{});
+  });
+
+  testWidgets('标题界面能真实渲染出来（非黑屏）', (WidgetTester tester) async {
+    await _boot(tester);
+
+    expect(find.textContaining('启动失败'), findsNothing);
+    // 不得仍停留在加载态
+    expect(find.text('正在加载关卡…'), findsNothing, reason: '一直停在加载态，等同于黑屏');
+
+    // 标题菜单必须存在
+    expect(find.text('关卡选择'), findsOneWidget);
+    expect(find.text('自制关卡'), findsOneWidget);
+    expect(find.text('设置'), findsOneWidget);
+    expect(find.textContaining('23 个内置关卡'), findsOneWidget);
+
+    // 关键回归：按钮必须有可见尺寸且在屏内
+    final btn = find.text('关卡选择');
+    final btnSize = tester.getSize(btn);
+    final btnPos = tester.getTopLeft(btn);
+    expect(btnSize.width, greaterThan(0),
+        reason: '按钮宽度塌缩为 0，标题树布局被破坏（Positioned 必须是 Stack 直接子级）');
+    expect(btnSize.height, greaterThan(0));
+    expect(btnPos.dx, greaterThanOrEqualTo(0), reason: '按钮被定位到屏外');
+    expect(btnPos.dy, greaterThanOrEqualTo(0));
+  });
+
+  testWidgets('横屏小逻辑高度下标题不溢出（真机 BOTTOM OVERFLOWED 回归）',
+      (WidgetTester tester) async {
+    // 真机横屏 1080 物理高 ÷ DPR ≈ 360~400 **逻辑**像素；此前测试用的
+    // 2340×1080 是逻辑尺寸、远高于真机，所以测不出溢出。
+    await tester.binding.setSurfaceSize(const Size(800, 360));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+    SharedPreferences.setMockInitialValues(<String, Object>{});
+    await tester.runAsync(() async {
+      await Save.load();
+      await loadLevels();
+    });
+
+    // 布局溢出（RenderFlex overflow）在测试里会作为异常抛出并使测试失败。
+    await tester.pumpWidget(const AppRoot());
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump();
+
+    expect(AppError.current.value, isNull, reason: '小高度下渲染抛出了异常');
+    expect(find.text('关卡选择'), findsOneWidget);
+    expect(tester.getSize(find.text('关卡选择')).height, greaterThan(0));
+
+    // 一屏放不下的底部文案必须滚动可达
+    final footer = find.textContaining('非商业同人作品');
+    await tester.scrollUntilVisible(footer, 120);
+    expect(footer, findsOneWidget);
+  });
+
+  testWidgets('游戏画布拿到真实尺寸并按信箱缩放', (WidgetTester tester) async {
+    await _boot(tester);
+
+    final canvas = find.byType(GameCanvas);
+    expect(canvas, findsOneWidget);
+    final Size size = tester.getSize(canvas);
+    // 必须是全屏尺寸，而不是 0（之前整棵 Stack 布局塌缩时画布也是 0×0）
+    expect(size.width, greaterThan(0), reason: '画布宽度为 0，界面不会显示任何内容');
+    expect(size.height, greaterThan(0));
+    expect(size.width, kLandscapePhone.width);
+    // 800×608 的画面按信箱缩放居中：横屏下高度占满、左右留黑边
+    final double s =
+        size.width / W < size.height / H ? size.width / W : size.height / H;
+    final stage = letterboxRect(size);
+    expect(s, greaterThan(0));
+    expect(stage.width, closeTo(800 * s, 0.001));
+    expect(stage.height, closeTo(608 * s, 0.001));
+    expect(stage.left, closeTo((size.width - 800 * s) / 2, 0.001));
+    expect(stage.width, lessThan(size.width),
+        reason: '横屏宽高比大于画面比例，应当左右留黑边');
+    expect(stage.height, closeTo(size.height, 0.001),
+        reason: '横屏下画面高度应被占满');
+  });
+
+  testWidgets('HUD / Toast 有可见尺寸（不得横向塌缩）', (WidgetTester tester) async {
+    await tester.binding.setSurfaceSize(const Size(1080, 2340));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+
+    final hud = ValueNotifier<Map<String, dynamic>>(<String, dynamic>{
+      'name': '测试关卡',
+      'deaths': 3,
+      'ms': 12345,
+      'apples': 1,
+      'totalApples': 3,
+      'save': 0,
+      'totalSaves': 4,
+    });
+    final boss = ValueNotifier<dynamic>(null);
+    final toast = ValueNotifier<String>('测试提示');
+    addTearDown(() {
+      hud.dispose();
+      boss.dispose();
+      toast.dispose();
+    });
+
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: Stack(
+          children: <Widget>[
+            Positioned.fill(child: HudOverlay(hud: hud, boss: boss, toast: toast)),
+          ],
+        ),
+      ),
+    ));
+    await tester.pump();
+
+    // 关卡名必须被撑开到有宽度（Positioned 嵌套错误时会塌缩为 0）
+    final name = find.text('测试关卡');
+    expect(name, findsOneWidget);
+    final Size size = tester.getSize(name);
+    expect(size.width, greaterThan(0),
+        reason: 'HUD 宽度为 0：Positioned 未作为 Stack 直接子级，布局被丢弃');
+    expect(size.height, greaterThan(0));
+
+    // Toast 同样必须可见
+    final tip = find.text('测试提示');
+    expect(tip, findsOneWidget);
+    expect(tester.getSize(tip).width, greaterThan(0));
+
+    // 苹果 / 存档 文案与 web 版保持一致
+    expect(find.text('苹果 1/3'), findsOneWidget);
+    expect(find.text('存档 0/4'), findsOneWidget);
+  });
+
+  testWidgets('从标题点进关卡能真正开始游戏（端到端）',
+      (WidgetTester tester) async {
+    await _boot(tester);
+
+    // 进入关卡选择（注意：游戏 Ticker 常驻，不能用 pumpAndSettle）
+    await tester.tap(find.text('关卡选择'));
+    await tester.pump(const Duration(milliseconds: 100));
+    await tester.pump();
+
+    // 点第一张关卡卡片 → 应进入 playing 态并显示 HUD
+    final card = find.text(LEVELS.first['name'] as String);
+    expect(card, findsWidgets);
+    await tester.tap(card.first);
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump();
+
+    expect(AppError.current.value, isNull, reason: '进入关卡的过程中抛出了异常');
+    // 画布仍在正常出帧
+    expect(tester.getSize(find.byType(GameCanvas)).width, greaterThan(0));
+    // HUD 的关卡名已显示且有可见宽度
+    final hudName = find.text(LEVELS.first['name'] as String);
+    expect(hudName, findsWidgets);
+  });
+
+  testWidgets('横屏下虚拟手柄按钮落在画面区域内（不飘到黑边上）',
+      (WidgetTester tester) async {
+    await tester.binding.setSurfaceSize(kLandscapePhone);
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+    SharedPreferences.setMockInitialValues(<String, Object>{});
+    await tester.runAsync(() async {
+      await Save.load();
+      await loadLevels();
+    });
+
+    final visible = ValueNotifier<bool>(true);
+    final hasGun = ValueNotifier<bool>(false);
+    addTearDown(() {
+      visible.dispose();
+      hasGun.dispose();
+    });
+
+    // 需要一个 World 才有回调目标（构造不触发任何加载）。
+    final world = World(_Host());
+
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: Stack(
+          children: <Widget>[
+            Positioned.fill(
+              child: TouchControls(
+                  world: world, visible: visible, hasGun: hasGun),
+            ),
+          ],
+        ),
+      ),
+    ));
+    await tester.pump();
+
+    final Size screen = tester.getSize(find.byType(TouchControls));
+    final stage = letterboxRect(screen);
+    expect(stage.left, greaterThan(0), reason: '横屏下应存在左右黑边');
+
+    // 「◀」左移键必须落在画面矩形内，而不是黑边上
+    final leftBtn = find.text('◀');
+    expect(leftBtn, findsOneWidget);
+    final Size btnSize = tester.getSize(leftBtn);
+    expect(btnSize.width, greaterThan(0));
+    final Offset pos = tester.getTopLeft(leftBtn);
+    expect(pos.dx, greaterThanOrEqualTo(stage.left),
+        reason: '左移键飘到了左侧黑边上（应锚定在画面区域内）');
+    expect(pos.dx + btnSize.width, lessThanOrEqualTo(stage.right));
+
+    // 「跳」键同理，且必须完整在屏内
+    final jumpBtn = find.text('跳');
+    expect(jumpBtn, findsOneWidget);
+    final Offset jp = tester.getTopLeft(jumpBtn);
+    final Size js = tester.getSize(jumpBtn);
+    expect(jp.dx, greaterThanOrEqualTo(stage.left));
+    expect(jp.dx + js.width, lessThanOrEqualTo(screen.width));
+    expect(js.width, greaterThan(0));
+  });
+
+  testWidgets('设置界面能渲染，手柄预览可见', (WidgetTester tester) async {
+    await _boot(tester);
+
+    await tester.tap(find.text('设置'));
+    await tester.pump(const Duration(milliseconds: 100));
+    await tester.pump();
+
+    expect(AppError.current.value, isNull, reason: '设置界面渲染时抛出了异常');
+    expect(find.byType(SettingsScreen), findsOneWidget);
+    // 手柄预览区（无线端：安卓默认 isTouch=true，键位区按设计不显示）
+    expect(find.text('手机操作按钮'), findsOneWidget);
+    final Size btn = tester.getSize(find.text('跳').first);
+    expect(btn.width, greaterThan(0), reason: '手柄预览按钮塌缩为 0 宽');
+    expect(find.text('恢复默认'), findsOneWidget);
+    expect(find.text('确定'), findsOneWidget);
+  });
+
+  testWidgets('桌面（非触屏）设置界面显示键位重绑', (WidgetTester tester) async {
+    await tester.binding.setSurfaceSize(const Size(1280, 720));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+    SharedPreferences.setMockInitialValues(<String, Object>{});
+    await tester.runAsync(() async {
+      await Save.load();
+      await loadLevels();
+    });
+
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: SettingsScreen(
+          world: World(_Host()),
+          isTouch: false,
+          onBack: () {},
+        ),
+      ),
+    ));
+    await tester.pump();
+
+    expect(AppError.current.value, isNull, reason: '设置界面构建时抛出了异常');
+    // 键位行（web 版 settings.js 的 KEY_ACTIONS）
+    expect(find.text('键盘按键'), findsOneWidget);
+    expect(find.text('左移'), findsOneWidget);
+    expect(find.text('跳跃'), findsOneWidget);
+    expect(find.text('自杀 / 重生'), findsOneWidget);
+    expect(find.text('整关重来'), findsOneWidget);
+    // 已绑定键位会以标签形式出现
+    expect(find.text('←'), findsWidgets);
+    expect(find.text('Shift'), findsWidgets);
+  });
+
+  testWidgets('内置关卡清单能从 assets 正确加载', (WidgetTester tester) async {
+    await tester.runAsync(() async {
+      await Save.load();
+      await loadLevels();
+    });
+    expect(LEVELS.isNotEmpty, isTrue, reason: 'levels.json 未加载到任何关卡');
+    expect(LEVELS.length, 23);
+  });
+}
+
+/// 仅供测试用的空 GameHost 实现。
+class _Host implements GameHost {
+  @override
+  void onBossBar(dynamic boss) {}
+  @override
+  void onHud(Map<String, dynamic> hud) {}
+  @override
+  void onPauseMenu(String label) {}
+  @override
+  void onResult(Map<String, dynamic> result) {}
+  @override
+  void onShowScreen(String screen) {}
+  @override
+  void onToast(String text) {}
+  @override
+  void editorShow() {}
+  @override
+  void touchHide() {}
+  @override
+  void touchSetGun(bool has) {}
+  @override
+  void touchShow() {}
+}
diff --git a/app/test/widget_test.dart b/app/test/widget_test.dart
new file mode 100644
index 0000000..1090cff
--- /dev/null
+++ b/app/test/widget_test.dart
@@ -0,0 +1,12 @@
+// Smoke test for the IWBT-C Flutter port. The default counter-app test was
+// removed because the app root is `AppRoot` (see lib/src/app_root.dart), not the
+// boilerplate `MyApp`.
+import 'package:flutter_test/flutter_test.dart';
+import 'package:iwbtc/src/app_root.dart' show AppRoot;
+
+void main() {
+  testWidgets('AppRoot instantiates', (WidgetTester tester) async {
+    // Smoke check: the game root widget constructs without throwing.
+    expect(const AppRoot(), isA<AppRoot>());
+  });
+}
diff --git a/app/web/favicon.png b/app/web/favicon.png
new file mode 100644
index 0000000..8aaa46a
Binary files /dev/null and b/app/web/favicon.png differ
diff --git a/app/web/icons/Icon-192.png b/app/web/icons/Icon-192.png
new file mode 100644
index 0000000..b749bfe
Binary files /dev/null and b/app/web/icons/Icon-192.png differ
diff --git a/app/web/icons/Icon-512.png b/app/web/icons/Icon-512.png
new file mode 100644
index 0000000..88cfd48
Binary files /dev/null and b/app/web/icons/Icon-512.png differ
diff --git a/app/web/icons/Icon-maskable-192.png b/app/web/icons/Icon-maskable-192.png
new file mode 100644
index 0000000..eb9b4d7
Binary files /dev/null and b/app/web/icons/Icon-maskable-192.png differ
diff --git a/app/web/icons/Icon-maskable-512.png b/app/web/icons/Icon-maskable-512.png
new file mode 100644
index 0000000..d69c566
Binary files /dev/null and b/app/web/icons/Icon-maskable-512.png differ
diff --git a/app/web/index.html b/app/web/index.html
new file mode 100644
index 0000000..2fe1ca6
--- /dev/null
+++ b/app/web/index.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <!--
+    If you are serving your web app in a path other than the root, change the
+    href value below to reflect the base path you are serving from.
+
+    The path provided below has to start and end with a slash "/" in order for
+    it to work correctly.
+
+    For more details:
+    * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
+
+    This is a placeholder for base href that will be replaced by the value of
+    the `--base-href` argument provided to `flutter build`.
+  -->
+  <base href="$FLUTTER_BASE_HREF">
+
+  <meta charset="UTF-8">
+  <meta content="IE=Edge" http-equiv="X-UA-Compatible">
+  <meta name="description" content="A new Flutter project.">
+
+  <!-- iOS meta tags & icons -->
+  <meta name="mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black">
+  <meta name="apple-mobile-web-app-title" content="iwbtc">
+  <link rel="apple-touch-icon" href="icons/Icon-192.png">
+
+  <!-- Favicon -->
+  <link rel="icon" type="image/png" href="favicon.png"/>
+
+  <title>iwbtc</title>
+  <link rel="manifest" href="manifest.json">
+</head>
+<body>
+  <!--
+    You can customize the "flutter_bootstrap.js" script.
+    This is useful to provide a custom configuration to the Flutter loader
+    or to give the user feedback during the initialization process.
+
+    For more details:
+    * https://docs.flutter.dev/platform-integration/web/initialization
+  -->
+  <script src="flutter_bootstrap.js" async></script>
+</body>
+</html>
diff --git a/app/web/manifest.json b/app/web/manifest.json
new file mode 100644
index 0000000..7096c79
--- /dev/null
+++ b/app/web/manifest.json
@@ -0,0 +1,35 @@
+{
+    "name": "iwbtc",
+    "short_name": "iwbtc",
+    "start_url": ".",
+    "display": "standalone",
+    "background_color": "#0175C2",
+    "theme_color": "#0175C2",
+    "description": "A new Flutter project.",
+    "orientation": "portrait-primary",
+    "prefer_related_applications": false,
+    "icons": [
+        {
+            "src": "icons/Icon-192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-maskable-192.png",
+            "sizes": "192x192",
+            "type": "image/png",
+            "purpose": "maskable"
+        },
+        {
+            "src": "icons/Icon-maskable-512.png",
+            "sizes": "512x512",
+            "type": "image/png",
+            "purpose": "maskable"
+        }
+    ]
+}
diff --git a/app/windows/.gitignore b/app/windows/.gitignore
new file mode 100644
index 0000000..d492d0d
--- /dev/null
+++ b/app/windows/.gitignore
@@ -0,0 +1,17 @@
+flutter/ephemeral/
+
+# Visual Studio user-specific files.
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Visual Studio build-related files.
+x64/
+x86/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
diff --git a/app/windows/CMakeLists.txt b/app/windows/CMakeLists.txt
new file mode 100644
index 0000000..ea798bc
--- /dev/null
+++ b/app/windows/CMakeLists.txt
@@ -0,0 +1,108 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.14)
+project(iwbtc LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "iwbtc")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(VERSION 3.14...3.25)
+
+# Define build configuration option.
+get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(IS_MULTICONFIG)
+  set(CMAKE_CONFIGURATION_TYPES "Debug;Profile;Release"
+    CACHE STRING "" FORCE)
+else()
+  if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    set(CMAKE_BUILD_TYPE "Debug" CACHE
+      STRING "Flutter build mode" FORCE)
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+      "Debug" "Profile" "Release")
+  endif()
+endif()
+# Define settings for the Profile build mode.
+set(CMAKE_EXE_LINKER_FLAGS_PROFILE "${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
+set(CMAKE_SHARED_LINKER_FLAGS_PROFILE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE}")
+set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_RELEASE}")
+set(CMAKE_CXX_FLAGS_PROFILE "${CMAKE_CXX_FLAGS_RELEASE}")
+
+# Use Unicode for all projects.
+add_definitions(-DUNICODE -D_UNICODE)
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_17)
+  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100")
+  target_compile_options(${TARGET} PRIVATE /EHsc)
+  target_compile_definitions(${TARGET} PRIVATE "_HAS_EXCEPTIONS=0")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<CONFIG:Debug>:_DEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# Application build; see runner/CMakeLists.txt.
+add_subdirectory("runner")
+
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# Support files are copied into place next to the executable, so that it can
+# run in place. This is done instead of making a separate bundle (as on Linux)
+# so that building and running from within Visual Studio will work.
+set(BUILD_BUNDLE_DIR "$<TARGET_FILE_DIR:${BINARY_NAME}>")
+# Make the "install" step default, as it's required to run.
+set(CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD 1)
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+if(PLUGIN_BUNDLED_LIBRARIES)
+  install(FILES "${PLUGIN_BUNDLED_LIBRARIES}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
+
+# Copy the native assets provided by the build.dart from all packages.
+set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/windows/")
+install(DIRECTORY "${NATIVE_ASSETS_DIR}"
+   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+   COMPONENT Runtime)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  CONFIGURATIONS Profile;Release
+  COMPONENT Runtime)
diff --git a/app/windows/flutter/CMakeLists.txt b/app/windows/flutter/CMakeLists.txt
new file mode 100644
index 0000000..903f489
--- /dev/null
+++ b/app/windows/flutter/CMakeLists.txt
@@ -0,0 +1,109 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.14)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")
+
+# Set fallback configurations for older versions of the flutter tool.
+if (NOT DEFINED FLUTTER_TARGET_PLATFORM)
+  set(FLUTTER_TARGET_PLATFORM "windows-x64")
+endif()
+
+# === Flutter Library ===
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "flutter_export.h"
+  "flutter_windows.h"
+  "flutter_messenger.h"
+  "flutter_plugin_registrar.h"
+  "flutter_texture_registrar.h"
+)
+list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
+add_dependencies(flutter flutter_assemble)
+
+# === Wrapper ===
+list(APPEND CPP_WRAPPER_SOURCES_CORE
+  "core_implementations.cc"
+  "standard_codec.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
+  "plugin_registrar.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_APP
+  "flutter_engine.cc"
+  "flutter_view_controller.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")
+
+# Wrapper sources needed for a plugin.
+add_library(flutter_wrapper_plugin STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+)
+apply_standard_settings(flutter_wrapper_plugin)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  POSITION_INDEPENDENT_CODE ON)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  CXX_VISIBILITY_PRESET hidden)
+target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
+target_include_directories(flutter_wrapper_plugin PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_plugin flutter_assemble)
+
+# Wrapper sources needed for the runner.
+add_library(flutter_wrapper_app STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
+apply_standard_settings(flutter_wrapper_app)
+target_link_libraries(flutter_wrapper_app PUBLIC flutter)
+target_include_directories(flutter_wrapper_app PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_app flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
+set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
+    ${CPP_WRAPPER_SOURCES_APP}
+    ${PHONY_OUTPUT}
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
+      ${FLUTTER_TARGET_PLATFORM} $<CONFIG>
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
diff --git a/app/windows/flutter/generated_plugin_registrant.cc b/app/windows/flutter/generated_plugin_registrant.cc
new file mode 100644
index 0000000..09e8e2c
--- /dev/null
+++ b/app/windows/flutter/generated_plugin_registrant.cc
@@ -0,0 +1,14 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+#include <audioplayers_windows/audioplayers_windows_plugin.h>
+
+void RegisterPlugins(flutter::PluginRegistry* registry) {
+  AudioplayersWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("AudioplayersWindowsPlugin"));
+}
diff --git a/app/windows/flutter/generated_plugin_registrant.h b/app/windows/flutter/generated_plugin_registrant.h
new file mode 100644
index 0000000..dc139d8
--- /dev/null
+++ b/app/windows/flutter/generated_plugin_registrant.h
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter/plugin_registry.h>
+
+// Registers Flutter plugins.
+void RegisterPlugins(flutter::PluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
diff --git a/app/windows/flutter/generated_plugins.cmake b/app/windows/flutter/generated_plugins.cmake
new file mode 100644
index 0000000..53f4ef8
--- /dev/null
+++ b/app/windows/flutter/generated_plugins.cmake
@@ -0,0 +1,25 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+  audioplayers_windows
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+  jni
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/windows plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/windows plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)
diff --git a/app/windows/runner/CMakeLists.txt b/app/windows/runner/CMakeLists.txt
new file mode 100644
index 0000000..394917c
--- /dev/null
+++ b/app/windows/runner/CMakeLists.txt
@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.14)
+project(runner LANGUAGES CXX)
+
+# Define the application target. To change its name, change BINARY_NAME in the
+# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer
+# work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME} WIN32
+  "flutter_window.cpp"
+  "main.cpp"
+  "utils.cpp"
+  "win32_window.cpp"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+  "Runner.rc"
+  "runner.exe.manifest"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add preprocessor definitions for the build version.
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION=\"${FLUTTER_VERSION}\"")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_MAJOR=${FLUTTER_VERSION_MAJOR}")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_MINOR=${FLUTTER_VERSION_MINOR}")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_PATCH=${FLUTTER_VERSION_PATCH}")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_BUILD=${FLUTTER_VERSION_BUILD}")
+
+# Disable Windows macros that collide with C++ standard library functions.
+target_compile_definitions(${BINARY_NAME} PRIVATE "NOMINMAX")
+
+# Add dependency libraries and include directories. Add any application-specific
+# dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter flutter_wrapper_app)
+target_link_libraries(${BINARY_NAME} PRIVATE "dwmapi.lib")
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
diff --git a/app/windows/runner/Runner.rc b/app/windows/runner/Runner.rc
new file mode 100644
index 0000000..1784128
--- /dev/null
+++ b/app/windows/runner/Runner.rc
@@ -0,0 +1,121 @@
+// Microsoft Visual C++ generated resource script.
+//
+#pragma code_page(65001)
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (United States) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE
+BEGIN
+    "#include ""winres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+IDI_APP_ICON            ICON                    "resources\\app_icon.ico"
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+#if defined(FLUTTER_VERSION_MAJOR) && defined(FLUTTER_VERSION_MINOR) && defined(FLUTTER_VERSION_PATCH) && defined(FLUTTER_VERSION_BUILD)
+#define VERSION_AS_NUMBER FLUTTER_VERSION_MAJOR,FLUTTER_VERSION_MINOR,FLUTTER_VERSION_PATCH,FLUTTER_VERSION_BUILD
+#else
+#define VERSION_AS_NUMBER 1,0,0,0
+#endif
+
+#if defined(FLUTTER_VERSION)
+#define VERSION_AS_STRING FLUTTER_VERSION
+#else
+#define VERSION_AS_STRING "1.0.0"
+#endif
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION VERSION_AS_NUMBER
+ PRODUCTVERSION VERSION_AS_NUMBER
+ FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
+#ifdef _DEBUG
+ FILEFLAGS VS_FF_DEBUG
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS VOS__WINDOWS32
+ FILETYPE VFT_APP
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904e4"
+        BEGIN
+            VALUE "CompanyName", "com.iwbtc" "\0"
+            VALUE "FileDescription", "iwbtc" "\0"
+            VALUE "FileVersion", VERSION_AS_STRING "\0"
+            VALUE "InternalName", "iwbtc" "\0"
+            VALUE "LegalCopyright", "Copyright (C) 2026 com.iwbtc. All rights reserved." "\0"
+            VALUE "OriginalFilename", "iwbtc.exe" "\0"
+            VALUE "ProductName", "iwbtc" "\0"
+            VALUE "ProductVersion", VERSION_AS_STRING "\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1252
+    END
+END
+
+#endif    // English (United States) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
diff --git a/app/windows/runner/flutter_window.cpp b/app/windows/runner/flutter_window.cpp
new file mode 100644
index 0000000..955ee30
--- /dev/null
+++ b/app/windows/runner/flutter_window.cpp
@@ -0,0 +1,71 @@
+#include "flutter_window.h"
+
+#include <optional>
+
+#include "flutter/generated_plugin_registrant.h"
+
+FlutterWindow::FlutterWindow(const flutter::DartProject& project)
+    : project_(project) {}
+
+FlutterWindow::~FlutterWindow() {}
+
+bool FlutterWindow::OnCreate() {
+  if (!Win32Window::OnCreate()) {
+    return false;
+  }
+
+  RECT frame = GetClientArea();
+
+  // The size here must match the window dimensions to avoid unnecessary surface
+  // creation / destruction in the startup path.
+  flutter_controller_ = std::make_unique<flutter::FlutterViewController>(
+      frame.right - frame.left, frame.bottom - frame.top, project_);
+  // Ensure that basic setup of the controller was successful.
+  if (!flutter_controller_->engine() || !flutter_controller_->view()) {
+    return false;
+  }
+  RegisterPlugins(flutter_controller_->engine());
+  SetChildContent(flutter_controller_->view()->GetNativeWindow());
+
+  flutter_controller_->engine()->SetNextFrameCallback([&]() {
+    this->Show();
+  });
+
+  // Flutter can complete the first frame before the "show window" callback is
+  // registered. The following call ensures a frame is pending to ensure the
+  // window is shown. It is a no-op if the first frame hasn't completed yet.
+  flutter_controller_->ForceRedraw();
+
+  return true;
+}
+
+void FlutterWindow::OnDestroy() {
+  if (flutter_controller_) {
+    flutter_controller_ = nullptr;
+  }
+
+  Win32Window::OnDestroy();
+}
+
+LRESULT
+FlutterWindow::MessageHandler(HWND hwnd, UINT const message,
+                              WPARAM const wparam,
+                              LPARAM const lparam) noexcept {
+  // Give Flutter, including plugins, an opportunity to handle window messages.
+  if (flutter_controller_) {
+    std::optional<LRESULT> result =
+        flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam,
+                                                      lparam);
+    if (result) {
+      return *result;
+    }
+  }
+
+  switch (message) {
+    case WM_FONTCHANGE:
+      flutter_controller_->engine()->ReloadSystemFonts();
+      break;
+  }
+
+  return Win32Window::MessageHandler(hwnd, message, wparam, lparam);
+}
diff --git a/app/windows/runner/flutter_window.h b/app/windows/runner/flutter_window.h
new file mode 100644
index 0000000..6da0652
--- /dev/null
+++ b/app/windows/runner/flutter_window.h
@@ -0,0 +1,33 @@
+#ifndef RUNNER_FLUTTER_WINDOW_H_
+#define RUNNER_FLUTTER_WINDOW_H_
+
+#include <flutter/dart_project.h>
+#include <flutter/flutter_view_controller.h>
+
+#include <memory>
+
+#include "win32_window.h"
+
+// A window that does nothing but host a Flutter view.
+class FlutterWindow : public Win32Window {
+ public:
+  // Creates a new FlutterWindow hosting a Flutter view running |project|.
+  explicit FlutterWindow(const flutter::DartProject& project);
+  virtual ~FlutterWindow();
+
+ protected:
+  // Win32Window:
+  bool OnCreate() override;
+  void OnDestroy() override;
+  LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam,
+                         LPARAM const lparam) noexcept override;
+
+ private:
+  // The project to run.
+  flutter::DartProject project_;
+
+  // The Flutter instance hosted by this window.
+  std::unique_ptr<flutter::FlutterViewController> flutter_controller_;
+};
+
+#endif  // RUNNER_FLUTTER_WINDOW_H_
diff --git a/app/windows/runner/main.cpp b/app/windows/runner/main.cpp
new file mode 100644
index 0000000..d3485ac
--- /dev/null
+++ b/app/windows/runner/main.cpp
@@ -0,0 +1,43 @@
+#include <flutter/dart_project.h>
+#include <flutter/flutter_view_controller.h>
+#include <windows.h>
+
+#include "flutter_window.h"
+#include "utils.h"
+
+int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
+                      _In_ wchar_t *command_line, _In_ int show_command) {
+  // Attach to console when present (e.g., 'flutter run') or create a
+  // new console when running with a debugger.
+  if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {
+    CreateAndAttachConsole();
+  }
+
+  // Initialize COM, so that it is available for use in the library and/or
+  // plugins.
+  ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
+
+  flutter::DartProject project(L"data");
+
+  std::vector<std::string> command_line_arguments =
+      GetCommandLineArguments();
+
+  project.set_dart_entrypoint_arguments(std::move(command_line_arguments));
+
+  FlutterWindow window(project);
+  Win32Window::Point origin(10, 10);
+  Win32Window::Size size(1280, 720);
+  if (!window.Create(L"iwbtc", origin, size)) {
+    return EXIT_FAILURE;
+  }
+  window.SetQuitOnClose(true);
+
+  ::MSG msg;
+  while (::GetMessage(&msg, nullptr, 0, 0)) {
+    ::TranslateMessage(&msg);
+    ::DispatchMessage(&msg);
+  }
+
+  ::CoUninitialize();
+  return EXIT_SUCCESS;
+}
diff --git a/app/windows/runner/resource.h b/app/windows/runner/resource.h
new file mode 100644
index 0000000..66a65d1
--- /dev/null
+++ b/app/windows/runner/resource.h
@@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by Runner.rc
+//
+#define IDI_APP_ICON                    101
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif
diff --git a/app/windows/runner/resources/app_icon.ico b/app/windows/runner/resources/app_icon.ico
new file mode 100644
index 0000000..c04e20c
Binary files /dev/null and b/app/windows/runner/resources/app_icon.ico differ
diff --git a/app/windows/runner/runner.exe.manifest b/app/windows/runner/runner.exe.manifest
new file mode 100644
index 0000000..153653e
--- /dev/null
+++ b/app/windows/runner/runner.exe.manifest
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
+    </windowsSettings>
+  </application>
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- Windows 10 and Windows 11 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+    </application>
+  </compatibility>
+</assembly>
diff --git a/app/windows/runner/utils.cpp b/app/windows/runner/utils.cpp
new file mode 100644
index 0000000..3cb7146
--- /dev/null
+++ b/app/windows/runner/utils.cpp
@@ -0,0 +1,69 @@
+#include "utils.h"
+
+#include <flutter_windows.h>
+#include <io.h>
+#include <stdio.h>
+#include <windows.h>
+
+#include <iostream>
+
+void CreateAndAttachConsole() {
+  if (::AllocConsole()) {
+    FILE *unused;
+    if (freopen_s(&unused, "CONOUT$", "w", stdout)) {
+      _dup2(_fileno(stdout), 1);
+    }
+    if (freopen_s(&unused, "CONOUT$", "w", stderr)) {
+      _dup2(_fileno(stdout), 2);
+    }
+    std::ios::sync_with_stdio();
+    FlutterDesktopResyncOutputStreams();
+  }
+}
+
+std::vector<std::string> GetCommandLineArguments() {
+  // Convert the UTF-16 command line arguments to UTF-8 for the Engine to use.
+  int argc;
+  wchar_t** argv = ::CommandLineToArgvW(::GetCommandLineW(), &argc);
+  if (argv == nullptr) {
+    return std::vector<std::string>();
+  }
+
+  std::vector<std::string> command_line_arguments;
+
+  // Skip the first argument as it's the binary name.
+  for (int i = 1; i < argc; i++) {
+    command_line_arguments.push_back(Utf8FromUtf16(argv[i]));
+  }
+
+  ::LocalFree(argv);
+
+  return command_line_arguments;
+}
+
+std::string Utf8FromUtf16(const wchar_t* utf16_string) {
+  if (utf16_string == nullptr) {
+    return std::string();
+  }
+  // First, find the length of the string with a safe upper bound (CWE-126).
+  // UNICODE_STRING_MAX_CHARS (32767) is the maximum length of a UNICODE_STRING.
+  int input_length = static_cast<int>(wcsnlen(utf16_string, UNICODE_STRING_MAX_CHARS));
+  // Now use that bounded length to determine the required buffer size.
+  // When an explicit length is passed, WideCharToMultiByte does not include
+  // the null terminator in its returned size.
+  int target_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      input_length, nullptr, 0, nullptr, nullptr);
+  std::string utf8_string;
+  if (target_length == 0 || static_cast<size_t>(target_length) > utf8_string.max_size()) {
+    return utf8_string;
+  }
+  utf8_string.resize(target_length);
+  int converted_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      input_length, utf8_string.data(), target_length, nullptr, nullptr);
+  if (converted_length == 0) {
+    return std::string();
+  }
+  return utf8_string;
+}
diff --git a/app/windows/runner/utils.h b/app/windows/runner/utils.h
new file mode 100644
index 0000000..3879d54
--- /dev/null
+++ b/app/windows/runner/utils.h
@@ -0,0 +1,19 @@
+#ifndef RUNNER_UTILS_H_
+#define RUNNER_UTILS_H_
+
+#include <string>
+#include <vector>
+
+// Creates a console for the process, and redirects stdout and stderr to
+// it for both the runner and the Flutter library.
+void CreateAndAttachConsole();
+
+// Takes a null-terminated wchar_t* encoded in UTF-16 and returns a std::string
+// encoded in UTF-8. Returns an empty std::string on failure.
+std::string Utf8FromUtf16(const wchar_t* utf16_string);
+
+// Gets the command line arguments passed in as a std::vector<std::string>,
+// encoded in UTF-8. Returns an empty std::vector<std::string> on failure.
+std::vector<std::string> GetCommandLineArguments();
+
+#endif  // RUNNER_UTILS_H_
diff --git a/app/windows/runner/win32_window.cpp b/app/windows/runner/win32_window.cpp
new file mode 100644
index 0000000..60608d0
--- /dev/null
+++ b/app/windows/runner/win32_window.cpp
@@ -0,0 +1,288 @@
+#include "win32_window.h"
+
+#include <dwmapi.h>
+#include <flutter_windows.h>
+
+#include "resource.h"
+
+namespace {
+
+/// Window attribute that enables dark mode window decorations.
+///
+/// Redefined in case the developer's machine has a Windows SDK older than
+/// version 10.0.22000.0.
+/// See: https://docs.microsoft.com/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
+#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
+#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
+#endif
+
+constexpr const wchar_t kWindowClassName[] = L"FLUTTER_RUNNER_WIN32_WINDOW";
+
+/// Registry key for app theme preference.
+///
+/// A value of 0 indicates apps should use dark mode. A non-zero or missing
+/// value indicates apps should use light mode.
+constexpr const wchar_t kGetPreferredBrightnessRegKey[] =
+  L"Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize";
+constexpr const wchar_t kGetPreferredBrightnessRegValue[] = L"AppsUseLightTheme";
+
+// The number of Win32Window objects that currently exist.
+static int g_active_window_count = 0;
+
+using EnableNonClientDpiScaling = BOOL __stdcall(HWND hwnd);
+
+// Scale helper to convert logical scaler values to physical using passed in
+// scale factor
+int Scale(int source, double scale_factor) {
+  return static_cast<int>(source * scale_factor);
+}
+
+// Dynamically loads the |EnableNonClientDpiScaling| from the User32 module.
+// This API is only needed for PerMonitor V1 awareness mode.
+void EnableFullDpiSupportIfAvailable(HWND hwnd) {
+  HMODULE user32_module = LoadLibraryA("User32.dll");
+  if (!user32_module) {
+    return;
+  }
+  auto enable_non_client_dpi_scaling =
+      reinterpret_cast<EnableNonClientDpiScaling*>(
+          GetProcAddress(user32_module, "EnableNonClientDpiScaling"));
+  if (enable_non_client_dpi_scaling != nullptr) {
+    enable_non_client_dpi_scaling(hwnd);
+  }
+  FreeLibrary(user32_module);
+}
+
+}  // namespace
+
+// Manages the Win32Window's window class registration.
+class WindowClassRegistrar {
+ public:
+  ~WindowClassRegistrar() = default;
+
+  // Returns the singleton registrar instance.
+  static WindowClassRegistrar* GetInstance() {
+    if (!instance_) {
+      instance_ = new WindowClassRegistrar();
+    }
+    return instance_;
+  }
+
+  // Returns the name of the window class, registering the class if it hasn't
+  // previously been registered.
+  const wchar_t* GetWindowClass();
+
+  // Unregisters the window class. Should only be called if there are no
+  // instances of the window.
+  void UnregisterWindowClass();
+
+ private:
+  WindowClassRegistrar() = default;
+
+  static WindowClassRegistrar* instance_;
+
+  bool class_registered_ = false;
+};
+
+WindowClassRegistrar* WindowClassRegistrar::instance_ = nullptr;
+
+const wchar_t* WindowClassRegistrar::GetWindowClass() {
+  if (!class_registered_) {
+    WNDCLASS window_class{};
+    window_class.hCursor = LoadCursor(nullptr, IDC_ARROW);
+    window_class.lpszClassName = kWindowClassName;
+    window_class.style = CS_HREDRAW | CS_VREDRAW;
+    window_class.cbClsExtra = 0;
+    window_class.cbWndExtra = 0;
+    window_class.hInstance = GetModuleHandle(nullptr);
+    window_class.hIcon =
+        LoadIcon(window_class.hInstance, MAKEINTRESOURCE(IDI_APP_ICON));
+    window_class.hbrBackground = 0;
+    window_class.lpszMenuName = nullptr;
+    window_class.lpfnWndProc = Win32Window::WndProc;
+    RegisterClass(&window_class);
+    class_registered_ = true;
+  }
+  return kWindowClassName;
+}
+
+void WindowClassRegistrar::UnregisterWindowClass() {
+  UnregisterClass(kWindowClassName, nullptr);
+  class_registered_ = false;
+}
+
+Win32Window::Win32Window() {
+  ++g_active_window_count;
+}
+
+Win32Window::~Win32Window() {
+  --g_active_window_count;
+  Destroy();
+}
+
+bool Win32Window::Create(const std::wstring& title,
+                         const Point& origin,
+                         const Size& size) {
+  Destroy();
+
+  const wchar_t* window_class =
+      WindowClassRegistrar::GetInstance()->GetWindowClass();
+
+  const POINT target_point = {static_cast<LONG>(origin.x),
+                              static_cast<LONG>(origin.y)};
+  HMONITOR monitor = MonitorFromPoint(target_point, MONITOR_DEFAULTTONEAREST);
+  UINT dpi = FlutterDesktopGetDpiForMonitor(monitor);
+  double scale_factor = dpi / 96.0;
+
+  HWND window = CreateWindow(
+      window_class, title.c_str(), WS_OVERLAPPEDWINDOW,
+      Scale(origin.x, scale_factor), Scale(origin.y, scale_factor),
+      Scale(size.width, scale_factor), Scale(size.height, scale_factor),
+      nullptr, nullptr, GetModuleHandle(nullptr), this);
+
+  if (!window) {
+    return false;
+  }
+
+  UpdateTheme(window);
+
+  return OnCreate();
+}
+
+bool Win32Window::Show() {
+  return ShowWindow(window_handle_, SW_SHOWNORMAL);
+}
+
+// static
+LRESULT CALLBACK Win32Window::WndProc(HWND const window,
+                                      UINT const message,
+                                      WPARAM const wparam,
+                                      LPARAM const lparam) noexcept {
+  if (message == WM_NCCREATE) {
+    auto window_struct = reinterpret_cast<CREATESTRUCT*>(lparam);
+    SetWindowLongPtr(window, GWLP_USERDATA,
+                     reinterpret_cast<LONG_PTR>(window_struct->lpCreateParams));
+
+    auto that = static_cast<Win32Window*>(window_struct->lpCreateParams);
+    EnableFullDpiSupportIfAvailable(window);
+    that->window_handle_ = window;
+  } else if (Win32Window* that = GetThisFromHandle(window)) {
+    return that->MessageHandler(window, message, wparam, lparam);
+  }
+
+  return DefWindowProc(window, message, wparam, lparam);
+}
+
+LRESULT
+Win32Window::MessageHandler(HWND hwnd,
+                            UINT const message,
+                            WPARAM const wparam,
+                            LPARAM const lparam) noexcept {
+  switch (message) {
+    case WM_DESTROY:
+      window_handle_ = nullptr;
+      Destroy();
+      if (quit_on_close_) {
+        PostQuitMessage(0);
+      }
+      return 0;
+
+    case WM_DPICHANGED: {
+      auto newRectSize = reinterpret_cast<RECT*>(lparam);
+      LONG newWidth = newRectSize->right - newRectSize->left;
+      LONG newHeight = newRectSize->bottom - newRectSize->top;
+
+      SetWindowPos(hwnd, nullptr, newRectSize->left, newRectSize->top, newWidth,
+                   newHeight, SWP_NOZORDER | SWP_NOACTIVATE);
+
+      return 0;
+    }
+    case WM_SIZE: {
+      RECT rect = GetClientArea();
+      if (child_content_ != nullptr) {
+        // Size and position the child window.
+        MoveWindow(child_content_, rect.left, rect.top, rect.right - rect.left,
+                   rect.bottom - rect.top, TRUE);
+      }
+      return 0;
+    }
+
+    case WM_ACTIVATE:
+      if (child_content_ != nullptr) {
+        SetFocus(child_content_);
+      }
+      return 0;
+
+    case WM_DWMCOLORIZATIONCOLORCHANGED:
+      UpdateTheme(hwnd);
+      return 0;
+  }
+
+  return DefWindowProc(window_handle_, message, wparam, lparam);
+}
+
+void Win32Window::Destroy() {
+  OnDestroy();
+
+  if (window_handle_) {
+    DestroyWindow(window_handle_);
+    window_handle_ = nullptr;
+  }
+  if (g_active_window_count == 0) {
+    WindowClassRegistrar::GetInstance()->UnregisterWindowClass();
+  }
+}
+
+Win32Window* Win32Window::GetThisFromHandle(HWND const window) noexcept {
+  return reinterpret_cast<Win32Window*>(
+      GetWindowLongPtr(window, GWLP_USERDATA));
+}
+
+void Win32Window::SetChildContent(HWND content) {
+  child_content_ = content;
+  SetParent(content, window_handle_);
+  RECT frame = GetClientArea();
+
+  MoveWindow(content, frame.left, frame.top, frame.right - frame.left,
+             frame.bottom - frame.top, true);
+
+  SetFocus(child_content_);
+}
+
+RECT Win32Window::GetClientArea() {
+  RECT frame;
+  GetClientRect(window_handle_, &frame);
+  return frame;
+}
+
+HWND Win32Window::GetHandle() {
+  return window_handle_;
+}
+
+void Win32Window::SetQuitOnClose(bool quit_on_close) {
+  quit_on_close_ = quit_on_close;
+}
+
+bool Win32Window::OnCreate() {
+  // No-op; provided for subclasses.
+  return true;
+}
+
+void Win32Window::OnDestroy() {
+  // No-op; provided for subclasses.
+}
+
+void Win32Window::UpdateTheme(HWND const window) {
+  DWORD light_mode;
+  DWORD light_mode_size = sizeof(light_mode);
+  LSTATUS result = RegGetValue(HKEY_CURRENT_USER, kGetPreferredBrightnessRegKey,
+                               kGetPreferredBrightnessRegValue,
+                               RRF_RT_REG_DWORD, nullptr, &light_mode,
+                               &light_mode_size);
+
+  if (result == ERROR_SUCCESS) {
+    BOOL enable_dark_mode = light_mode == 0;
+    DwmSetWindowAttribute(window, DWMWA_USE_IMMERSIVE_DARK_MODE,
+                          &enable_dark_mode, sizeof(enable_dark_mode));
+  }
+}
diff --git a/app/windows/runner/win32_window.h b/app/windows/runner/win32_window.h
new file mode 100644
index 0000000..e901dde
--- /dev/null
+++ b/app/windows/runner/win32_window.h
@@ -0,0 +1,102 @@
+#ifndef RUNNER_WIN32_WINDOW_H_
+#define RUNNER_WIN32_WINDOW_H_
+
+#include <windows.h>
+
+#include <functional>
+#include <memory>
+#include <string>
+
+// A class abstraction for a high DPI-aware Win32 Window. Intended to be
+// inherited from by classes that wish to specialize with custom
+// rendering and input handling
+class Win32Window {
+ public:
+  struct Point {
+    unsigned int x;
+    unsigned int y;
+    Point(unsigned int x, unsigned int y) : x(x), y(y) {}
+  };
+
+  struct Size {
+    unsigned int width;
+    unsigned int height;
+    Size(unsigned int width, unsigned int height)
+        : width(width), height(height) {}
+  };
+
+  Win32Window();
+  virtual ~Win32Window();
+
+  // Creates a win32 window with |title| that is positioned and sized using
+  // |origin| and |size|. New windows are created on the default monitor. Window
+  // sizes are specified to the OS in physical pixels, hence to ensure a
+  // consistent size this function will scale the inputted width and height as
+  // as appropriate for the default monitor. The window is invisible until
+  // |Show| is called. Returns true if the window was created successfully.
+  bool Create(const std::wstring& title, const Point& origin, const Size& size);
+
+  // Show the current window. Returns true if the window was successfully shown.
+  bool Show();
+
+  // Release OS resources associated with window.
+  void Destroy();
+
+  // Inserts |content| into the window tree.
+  void SetChildContent(HWND content);
+
+  // Returns the backing Window handle to enable clients to set icon and other
+  // window properties. Returns nullptr if the window has been destroyed.
+  HWND GetHandle();
+
+  // If true, closing this window will quit the application.
+  void SetQuitOnClose(bool quit_on_close);
+
+  // Return a RECT representing the bounds of the current client area.
+  RECT GetClientArea();
+
+ protected:
+  // Processes and route salient window messages for mouse handling,
+  // size change and DPI. Delegates handling of these to member overloads that
+  // inheriting classes can handle.
+  virtual LRESULT MessageHandler(HWND window,
+                                 UINT const message,
+                                 WPARAM const wparam,
+                                 LPARAM const lparam) noexcept;
+
+  // Called when CreateAndShow is called, allowing subclass window-related
+  // setup. Subclasses should return false if setup fails.
+  virtual bool OnCreate();
+
+  // Called when Destroy is called.
+  virtual void OnDestroy();
+
+ private:
+  friend class WindowClassRegistrar;
+
+  // OS callback called by message pump. Handles the WM_NCCREATE message which
+  // is passed when the non-client area is being created and enables automatic
+  // non-client DPI scaling so that the non-client area automatically
+  // responds to changes in DPI. All other messages are handled by
+  // MessageHandler.
+  static LRESULT CALLBACK WndProc(HWND const window,
+                                  UINT const message,
+                                  WPARAM const wparam,
+                                  LPARAM const lparam) noexcept;
+
+  // Retrieves a class instance pointer for |window|
+  static Win32Window* GetThisFromHandle(HWND const window) noexcept;
+
+  // Update the window frame's theme to match the system theme.
+  static void UpdateTheme(HWND const window);
+
+  bool quit_on_close_ = false;
+
+  // window handle for top level window.
+  HWND window_handle_ = nullptr;
+
+  // window handle for hosted content.
+  HWND child_content_ = nullptr;
+};
+
+#endif  // RUNNER_WIN32_WINDOW_H_
diff --git a/css/style.css b/tmp/css/style.css
similarity index 100%
rename from css/style.css
rename to tmp/css/style.css
diff --git a/tmp/dump_levels.mjs b/tmp/dump_levels.mjs
new file mode 100644
index 0000000..9757c5f
--- /dev/null
+++ b/tmp/dump_levels.mjs
@@ -0,0 +1,25 @@
+// One-off: export all built-in levels to JSON for the Flutter port.
+import { LEVELS, TYPE_LABEL, TYPE_CLASS } from './js/levels/index.js';
+import { writeFileSync } from 'fs';
+
+// Sanity: ensure serializable and report shapes.
+function deepCheck(v, path) {
+  if (v === null || v === undefined) return;
+  if (typeof v === 'function') throw new Error('function at ' + path);
+  if (typeof v === 'object') {
+    if (Array.isArray(v)) { v.forEach((e, i) => deepCheck(e, path + '[' + i + ']')); }
+    else { for (const k of Object.keys(v)) deepCheck(v[k], path + '.' + k); }
+  }
+}
+for (const l of LEVELS) deepCheck(l, l.id || '?');
+
+const out = {
+  levels: LEVELS,
+  typeLabel: TYPE_LABEL,
+  typeClass: TYPE_CLASS,
+};
+writeFileSync('levels_dump.json', JSON.stringify(out));
+console.log('OK levels=', LEVELS.length, 'bytes=', JSON.stringify(out).length);
+for (const l of LEVELS) {
+  console.log(' -', l.id, l.name, 'type=' + l.type, 'w=' + l.width, 'rows=' + (l.grid ? l.grid.length : '?'));
+}
diff --git a/index.html b/tmp/index.html
similarity index 100%
rename from index.html
rename to tmp/index.html
diff --git a/js/audio.js b/tmp/js/audio.js
similarity index 100%
rename from js/audio.js
rename to tmp/js/audio.js
diff --git a/js/boss.js b/tmp/js/boss.js
similarity index 100%
rename from js/boss.js
rename to tmp/js/boss.js
diff --git a/js/camera.js b/tmp/js/camera.js
similarity index 100%
rename from js/camera.js
rename to tmp/js/camera.js
diff --git a/js/editor.js b/tmp/js/editor.js
similarity index 100%
rename from js/editor.js
rename to tmp/js/editor.js
diff --git a/js/input.js b/tmp/js/input.js
similarity index 100%
rename from js/input.js
rename to tmp/js/input.js
diff --git a/js/level.js b/tmp/js/level.js
similarity index 100%
rename from js/level.js
rename to tmp/js/level.js
diff --git a/js/levels/boss.js b/tmp/js/levels/boss.js
similarity index 100%
rename from js/levels/boss.js
rename to tmp/js/levels/boss.js
diff --git a/js/levels/endurance.js b/tmp/js/levels/endurance.js
similarity index 100%
rename from js/levels/endurance.js
rename to tmp/js/levels/endurance.js
diff --git a/js/levels/index.js b/tmp/js/levels/index.js
similarity index 100%
rename from js/levels/index.js
rename to tmp/js/levels/index.js
diff --git a/js/levels/jump.js b/tmp/js/levels/jump.js
similarity index 100%
rename from js/levels/jump.js
rename to tmp/js/levels/jump.js
diff --git a/js/levels/kit.js b/tmp/js/levels/kit.js
similarity index 100%
rename from js/levels/kit.js
rename to tmp/js/levels/kit.js
diff --git a/js/levels/needle.js b/tmp/js/levels/needle.js
similarity index 100%
rename from js/levels/needle.js
rename to tmp/js/levels/needle.js
diff --git a/js/levels/troll.js b/tmp/js/levels/troll.js
similarity index 100%
rename from js/levels/troll.js
rename to tmp/js/levels/troll.js
diff --git a/js/levels/tutorial.js b/tmp/js/levels/tutorial.js
similarity index 100%
rename from js/levels/tutorial.js
rename to tmp/js/levels/tutorial.js
diff --git a/js/main.js b/tmp/js/main.js
similarity index 100%
rename from js/main.js
rename to tmp/js/main.js
diff --git a/js/particles.js b/tmp/js/particles.js
similarity index 100%
rename from js/particles.js
rename to tmp/js/particles.js
diff --git a/js/player.js b/tmp/js/player.js
similarity index 100%
rename from js/player.js
rename to tmp/js/player.js
diff --git a/js/save.js b/tmp/js/save.js
similarity index 100%
rename from js/save.js
rename to tmp/js/save.js
diff --git a/js/settings.js b/tmp/js/settings.js
similarity index 100%
rename from js/settings.js
rename to tmp/js/settings.js
diff --git a/js/sprites.js b/tmp/js/sprites.js
similarity index 100%
rename from js/sprites.js
rename to tmp/js/sprites.js
diff --git a/js/touch.js b/tmp/js/touch.js
similarity index 100%
rename from js/touch.js
rename to tmp/js/touch.js
diff --git a/js/ui.js b/tmp/js/ui.js
similarity index 100%
rename from js/ui.js
rename to tmp/js/ui.js
diff --git a/js/util.js b/tmp/js/util.js
similarity index 100%
rename from js/util.js
rename to tmp/js/util.js
diff --git a/tmp/levels_dump.json b/tmp/levels_dump.json
new file mode 100644
index 0000000..88c864f
--- /dev/null
+++ b/tmp/levels_dump.json
@@ -0,0 +1 @@
+{"levels":[{"id":"t1","name":"FIRST STEPS","type":"jump","diff":1,"bg":"jump","width":36,"hint":"← → 移动，Shift / Z / 空格跳跃。刺碰到就死，R 键重来。","messages":["← → 移动　Shift 跳跃　R 重来"],"grid":["####################################","#..................................#","#..................................#","#..................................#","#..................................#","#..................................#","#..................................#","#.............................X....#","#............................#####.#","#..................................#","#.........................#####....#","#..................................#","#.....................#####........#","#..................................#","#.................#####............#","#..................................#","#............#####.................#","#.S.T..^^^............G............#","####################################"],"index":0,"builtin":true},{"id":"t2","name":"DOUBLE JUMP","type":"jump","diff":1,"bg":"custom","width":40,"hint":"空中再按一次跳跃＝二段跳。5 格宽的刺坑只能靠二段跳过去。","messages":["空中再按一次 Shift ＝ 二段跳"],"grid":["########################################","#......................................#","#......................................#","#......................................#","#......................................#","#......................................#","#......................................#","#......................................#","#..................X...................#","#.................####.................#","#......................................#","#.........................####.........#","#......................................#","#.................####.................#","#......................................#","#.........................####.........#","#......................................#","#.................####.................#","#.S.T......^^^^^...G...................#","########################################"],"index":1,"builtin":true},{"id":"j1","name":"SPIKE ALLEY","cn":"刺巷","type":"jump","diff":2,"hint":"针刺入门：刺毯单跳节奏、钻石缝、矮洞撞头跳、竖井、对刺门。","width":104,"grid":["########################################################################################################","#......................................................................................................#","#......................................................................................................#","#......................................................................................................#","#......................................................................................................#","#......................................................................................................#","#................................................................................vvvvvvvvvvvvvvv.......#","#......................................................................................................#","#......................................................................................................#","#......................................................................................................#","#..............................................................................#.......................#","#..............................................................................#..G^.^^.^..>^<G^.......#","#.........................................................................#....###################.....#","#.........................................................................###..#.......................#","#.........................................................................#....#.......................#","#.........................................................................>....#...................>...#","#.........vvvvvvvvvvvvvvvvv.vvvvvvvvvvvvvvvv..............................#..###...................>...#","#.........................................................................#....<...................>..<#","#...........................................#############..........#......#....#...................>..<#","#..............v.....v........v...v...v......................#.....#.......##..#...................>..<#","#.........................................................#..#..#..#..#........#......................<#","#..S....G.^^^..^..^..^..^.^.G.^...^...^..^^..G.>.<..>^<...#..#..#..#..#.G......#....................X..#","#########################################################..............#################################","#........................................................^^^^^^^^^^^^^^................................#","#......................................................................................................#","########################################################################################################"],"index":2,"builtin":true},{"id":"j2","name":"VERTICAL HELL","cn":"垂直地狱","type":"jump","diff":3,"hint":"52 格高塔：四段之字竖井，每层刺毯+上下夹缝，垂刺压顶、掉落刺追身。","width":68,"grid":["####################################################################","#..................................................................#","#..................................................................#","#..................................................................#","#..................................................................#","#..................................................................#","#..................................................................#","#..................................................................#","#..................................................................#","#..................................................................#","#.................D...............D.....................D..........#","#..........vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv......#","#..................................................................#","#.......................................v..........................#","#..................................................................#","#..........^.^.^^.^^.^^..>.G..^^.^^.^^..^..^.^^.^^.G.<.^.^^.^^X....#","##..##############################################################.#","##.......#.........................................................#","#######..#....D.........D.........D.........D......................#","##......^#vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv............#","##..######.........................................................#","##^...................v.................v..........................#","#######............................................................#","##.........^^.^^.^^G..^...^^.^^.^^.^^...^...^^.G^.^^.^.............#","###############################################################...##","#........................................................#........##","#........................................................#...#######","#..........vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv..#^.......##","#........................................................######...##","#...............................v.................v..............^##","#............................................................#######","#..........^.^.^^.^G.>.<.^.^^...^...^^.^.>.<.^^G..^...^^..........##","##..################################################################","##.......#.........................................................#","#######..#.........................................................#","##......^#vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv............#","##..######.........................................................#","##^.........v.............v...............v........................#","#######............................................................#","##..........^..^.^^G^^.^..^..^^.^^.^^.^^..^..^.G^.^^.^.............#","###############################################################...##","#........................................................#........##","#........................................................#...#######","#....vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv..#^.......##","#........................................................######...##","#...............v.............v...............v..................^##","#............................................................#######","#..S.^.^.^^G^^..^..^.^^.^^.^..^..^^.^^.G^.^^..^..^.^^.^...........##","####################################################################","#..................................................................#","#..................................................................#","####################################################################"],"index":3,"builtin":true},{"id":"j3","name":"TIGHTROPE","cn":"钢丝","type":"jump","diff":3,"hint":"一格宽的柱子立在刺海上，高矮间距都不同，垂刺压着头顶。","width":132,"grid":["####################################################################################################################################","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#...............................vvvvvvvvvvvvvvvvvvvvvvvvv...vvvvvvvvvvvvvvvvvvvvvvvvvvvvv..........................................#","#.....vvvvvvvvvvvvvvvvvvvvvvv...............................................................vvvvvvvvvvvvvvvvvvvvvvvvvvvvv..........#","#..................................................................................................................................#","#..................................................................................................................................#","#..................................................................................................................................#","#......................G..........................#...............................#................................................#","#......................#..............#...........#.......G.......#...............#.......G.......#...............#.......G........#","#.......#......#.......#......#.......#.......#...#.......#.......#.......#.......#.......#.......#.......#.......#.......#........#","#.S.#...#......#...#...#......#...#...#.......#...#...#...#.......#...#...#.......#...#...#.......#...#...#.......#...#...#.....X..#","#####^^^#^^^#^^#^^^#^^^#^^^#^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^#^^^####.#","####################################################################################################################################","#..................................................................................................................................#","#..................................................................................................................................#","####################################################################################################################################"],"index":4,"builtin":true},{"id":"j4","name":"ICE 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