一个长方形可以按A或者D左移右移，在游戏开始会监听键盘事件，圆形在舞台下面往上跑，如果长方形碰到圆，游戏结束，就这么简单。看代码myGame.as，你可以新建一个Fla文件，然后以myGame.as为文档类：
package { import flash.display.MovieClip; import flash.events.Event; import flash.events.MouseEvent; import flash.display.*; import flash.events.*; import flash.text.TextField; public class myGame extends MovieClip{ public const State_init=1; public const State_play=2; public const State_over=3; public var gamestate:uint=0; public var success:uint=0; public var fail:int=0; public var player1:Sprite=new Sprite(); public var player2:Sprite=new Sprite(); public function myGame(){ player1.graphics.beginFill(0xFF0000); player1.graphics.drawRect(100,100,20,10); player1.graphics.endFill(); player2.graphics.beginFill(0); player2.graphics.drawCircle(200,400,10); player2.graphics.endFill(); stage.addChild(player1); stage.addChild(player2); //默认会初始化构造函数，添加监听当前的游戏状态 stage.addEventListener(Event.ENTER_FRAME,gameloop); //初始化游戏状态，要不gamestate=0; gamestate=State_init; // constructor code } public function gameloop(e:Event):void{ switch(gamestate) { case State_init: initGame(); break; case State_play: playGame(); break; case State_over: gameOver(); break; } } public function initGame():void{ stage.addEventListener(KeyboardEvent.KEY_DOWN,action); success=0; fail=0; gamestate=State_play; } public function action(e:KeyboardEvent):void{ if(e.keyCode==65){ trace(e.keyCode); player1.x-=2; }else if(e.keyCode==68){ player1.x+=2; } if(player1.hitTestObject(player2)){ gameOver(); trace("you win!"); } } public function playGame():void{ player2.y-=4; } public function gameOver():void{ stage.removeEventListener(KeyboardEvent.KEY_DOWN,action); gamestate=0; trace("game over"); }
} }
