一个课堂上做得小游戏 用鼠标单机控制小鸟的飞行确保不撞到柱子和地面，游戏有三个状态开始界面 和游戏状态和game over界面 图片是开始界面。。(A small game used in a classroom to control the flight of a bird with a single mouse machine to ensure that it does not hit the column and the ground, the game has three state