diff --git a/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.scene b/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.scene
index bb6b39e..e374f94 100644
--- a/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.scene
+++ b/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.scene
@@ -33,11 +33,11 @@
     "_active": true,
     "_components": [],
     "_prefab": {
-      "__id__": 57
+      "__id__": 58
     },
     "autoReleaseAssets": false,
     "_globals": {
-      "__id__": 60
+      "__id__": 61
     },
     "_id": "0d3889f6-dc9c-424e-b8cd-6fa78d63af15"
   },
@@ -483,9 +483,6 @@
     ],
     "_active": true,
     "_components": [
-      {
-        "__id__": 53
-      },
       {
         "__id__": 54
       },
@@ -494,6 +491,9 @@
       },
       {
         "__id__": 56
+      },
+      {
+        "__id__": 57
       }
     ],
     "_prefab": null,
@@ -811,7 +811,7 @@
   },
   {
     "__type__": "cc.Node",
-    "_name": "Button",
+    "_name": "btnAttack",
     "_objFlags": 0,
     "_parent": {
       "__id__": 25
@@ -831,6 +831,9 @@
       },
       {
         "__id__": 51
+      },
+      {
+        "__id__": 53
       }
     ],
     "_prefab": null,
@@ -949,7 +952,7 @@
       "b": 0,
       "a": 255
     },
-    "_string": "射",
+    "_string": "攻击",
     "_horizontalAlign": 1,
     "_verticalAlign": 1,
     "_actualFontSize": 40,
@@ -978,8 +981,8 @@
     "__prefab": null,
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 100,
-      "height": 100
+      "width": 120,
+      "height": 120
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -1104,6 +1107,18 @@
     "handler": "onBtnAttack",
     "customEventData": ""
   },
+  {
+    "__type__": "cc.UIOpacity",
+    "_name": "",
+    "_objFlags": 0,
+    "node": {
+      "__id__": 45
+    },
+    "_enabled": true,
+    "__prefab": null,
+    "_opacity": 255,
+    "_id": "49xySc2HlNZ7kO4VRCiutC"
+  },
   {
     "__type__": "cc.UITransform",
     "_name": "",
@@ -1196,6 +1211,9 @@
     "camera": {
       "__id__": 4
     },
+    "btnAttack": {
+      "__id__": 45
+    },
     "_id": "86PJf2PFRK5LGUONuKqmzS"
   },
   {
@@ -1203,14 +1221,14 @@
     "fileId": "",
     "targetOverrides": [
       {
-        "__id__": 58
+        "__id__": 59
       }
     ]
   },
   {
     "__type__": "cc.TargetOverrideInfo",
     "source": {
-      "__id__": 56
+      "__id__": 57
     },
     "sourceInfo": null,
     "propertyPath": [
@@ -1220,7 +1238,7 @@
       "__id__": 28
     },
     "targetInfo": {
-      "__id__": 59
+      "__id__": 60
     }
   },
   {
@@ -1232,16 +1250,16 @@
   {
     "__type__": "cc.SceneGlobals",
     "ambient": {
-      "__id__": 61
-    },
-    "shadows": {
       "__id__": 62
     },
-    "_skybox": {
+    "shadows": {
       "__id__": 63
     },
-    "fog": {
+    "_skybox": {
       "__id__": 64
+    },
+    "fog": {
+      "__id__": 65
     }
   },
   {
diff --git a/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.ts b/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.ts
index ac80240..e0d90ea 100644
--- a/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.ts
+++ b/examples/cocos-creator-multiplayer/frontend/assets/scenes/GameScene/GameScene.ts
@@ -1,5 +1,5 @@
 
-import { Component, instantiate, Node, Prefab, Vec2, _decorator } from 'cc';
+import { Button, Component, instantiate, Node, Prefab, UIOpacity, Vec2, _decorator } from 'cc';
 import { Arrow } from '../../prefabs/Arrow/Arrow';
 import { Joystick } from '../../prefabs/Joystick/Joystick';
 import { Player } from '../../prefabs/Player/Player';
@@ -9,18 +9,6 @@ import { gameConfig } from '../../scripts/shared/game/gameConfig';
 import { ArrowState } from '../../scripts/shared/game/state/ArrowState';
 const { ccclass, property } = _decorator;
 
-/**
- * Predefined variables
- * Name = GameScene
- * DateTime = Thu Dec 02 2021 18:43:36 GMT+0800 (中国标准时间)
- * Author = k8w
- * FileBasename = GameScene.ts
- * FileBasenameNoExtension = GameScene
- * URL = db://assets/scenes/GameScene/GameScene.ts
- * ManualUrl = https://docs.cocos.com/creator/3.3/manual/zh/
- *
- */
-
 @ccclass('GameScene')
 export class GameScene extends Component {
 
@@ -40,6 +28,9 @@ export class GameScene extends Component {
     @property(FollowCamera)
     camera: FollowCamera = null as any;
 
+    @property(Node)
+    btnAttack: Node = null as any;
+
     gameManager!: GameManager;
 
     private _playerInstances: { [playerId: number]: Player | undefined } = {};
@@ -49,6 +40,7 @@ export class GameScene extends Component {
     onLoad() {
         (window as any).game = this;
 
+        // 初始化摇杆
         this.joyStick.options = {
             onOperate: v => {
                 if (!this._selfSpeed) {
@@ -64,9 +56,10 @@ export class GameScene extends Component {
         this.gameManager = new GameManager();
 
         // 监听数据状态事件
+        // 新箭矢发射（仅表现）
         this.gameManager.gameSystem.onNewArrow.push(v => { this._onNewArrow(v) });
 
-        // 断线一秒后重连
+        // 断线 2 秒后自动重连
         this.gameManager.client.flows.postDisconnectFlow.push(v => {
             setTimeout(() => {
                 this.gameManager.join();
@@ -172,5 +165,13 @@ export class GameScene extends Component {
             targetPos: { x: targetPos.x, y: targetPos.y },
             targetTime: this.gameManager.state.now + gameConfig.arrowFlyTime
         } as any)
+
+        // 冷却时间 1 秒
+        this.btnAttack.getComponent(Button)!.interactable = false;
+        this.btnAttack.getComponent(UIOpacity)!.opacity = 120;
+        this.scheduleOnce(() => {
+            this.btnAttack.getComponent(Button)!.interactable = true;
+            this.btnAttack.getComponent(UIOpacity)!.opacity = 255;
+        }, 1)
     }
 }
\ No newline at end of file
diff --git a/examples/cocos-creator-multiplayer/frontend/assets/scripts/components/FollowCamera.ts b/examples/cocos-creator-multiplayer/frontend/assets/scripts/components/FollowCamera.ts
index eb40da3..0ff84f2 100644
--- a/examples/cocos-creator-multiplayer/frontend/assets/scripts/components/FollowCamera.ts
+++ b/examples/cocos-creator-multiplayer/frontend/assets/scripts/components/FollowCamera.ts
@@ -5,7 +5,7 @@ const { ccclass, property } = _decorator;
 const v3_1 = new Vec3;
 
 /**
- * 跟随摄像机
+ * 自动跟随目标，并平滑移动的摄像机
  */
 @ccclass
 export class FollowCamera extends Component {
diff --git a/examples/cocos-creator-multiplayer/frontend/assets/scripts/models/GameManager.ts b/examples/cocos-creator-multiplayer/frontend/assets/scripts/models/GameManager.ts
index 5d0c8dc..256f65a 100644
--- a/examples/cocos-creator-multiplayer/frontend/assets/scripts/models/GameManager.ts
+++ b/examples/cocos-creator-multiplayer/frontend/assets/scripts/models/GameManager.ts
@@ -94,7 +94,8 @@ export class GameManager {
 
     pendingInputMsgs: MsgClientInput[] = [];
     sendClientInput(input: ClientInput) {
-        if (!this.selfPlayerId) {
+        // 已掉线或暂未加入，忽略本地输入
+        if (!this.selfPlayerId || !this.client.isConnected) {
             return;
         }