fix: 修复了冰块惯性问题和死亡效果

css/style.css

@@ -5,7 +5,7 @@
   --gold:#ffc63a; --green:#3ddc84; --blue:#4aa8ff; --purple:#a86bff;
 }
 *{box-sizing:border-box;margin:0;padding:0}
-html,body{height:100%}
+html,body{height:100%;overscroll-behavior:none}
 body{
   background:
     radial-gradient(circle at 50% 20%, #1a1a28 0%, #08080d 70%);
@@ -178,3 +178,47 @@ canvas#ed-canvas{
   .palette{width:100%;flex-direction:row;flex-wrap:wrap;border-right:none;border-bottom:1px solid var(--line);padding-bottom:6px}
   .editor-side{width:100%;border-left:none;border-top:1px solid var(--line);padding-top:8px}
 }
+
+/* ---------- 移动端虚拟手柄（参考 IWBT Creator 触屏布局） ---------- */
+/* 桌面端兜底：只要 <html> 没有 .touch 类（即未检测到移动端/触屏），无论如何都不显示按钮 */
+html:not(.touch) #touch{display:none !important}
+#touch{
+  position:absolute;inset:0;z-index:25;
+  display:flex;justify-content:space-between;align-items:flex-end;
+  padding:12px 12px max(14px, env(safe-area-inset-bottom));
+  pointer-events:none;           /* 仅按钮可点，中间区域穿透到画布 */
+  touch-action:none;
+}
+#touch.hidden{display:none}
+
+.tc-left,.tc-right{display:flex;gap:14px;align-items:flex-end;pointer-events:none}
+.tc-right{flex-direction:column;align-items:flex-end}
+.tc-top{display:flex;gap:10px;margin-bottom:10px}
+.tc-mid{display:flex;gap:12px;align-items:flex-end;margin-bottom:10px}
+
+.tc-btn{
+  pointer-events:auto;-webkit-user-select:none;user-select:none;touch-action:none;
+  background:rgba(18,18,28,.52);border:2px solid rgba(255,255,255,.28);
+  color:#fff;font-family:inherit;display:flex;align-items:center;justify-content:center;
+  flex-direction:column;line-height:1;backdrop-filter:blur(2px);
+  box-shadow:0 2px 8px rgba(0,0,0,.35);
+  transition:transform .05s, background .1s, filter .1s;
+}
+.tc-btn span{font-size:1.5em}
+.tc-btn .lbl{font-size:.6em;letter-spacing:1px;opacity:.85;margin-top:2px}
+.tc-btn.on,.tc-btn:active{transform:scale(.93);background:rgba(224,48,80,.6);border-color:#ff5c7a}
+
+.tc-move{width:62px;height:62px;border-radius:14px}
+.tc-item{width:54px;height:54px;border-radius:50%}
+.tc-sm{width:42px;height:42px;border-radius:11px;font-size:1em}
+
+.tc-jump{
+  width:94px;height:94px;border-radius:50%;margin-top:4px;
+  background:radial-gradient(circle at 35% 30%, #ff7088, #c01a3a);
+  border:3px solid #ffd0da;box-shadow:0 6px 18px rgba(192,26,58,.5);
+  font-size:1.9em;font-weight:bold;color:#fff;
+}
+.tc-jump.on,.tc-jump:active{transform:scale(.92);filter:brightness(1.12)}
+
+/* 未持枪时射击键置灰 */
+#tc-gun.off{opacity:.4;filter:grayscale(1);background:rgba(18,18,28,.4)}