这是一个陨石撞飞机的平面游戏：陨石不断向下落，飞机通过上下左右移动以躲避陨石。找出位图处理、定时器、碰撞检测函数。完善该程序。-This is a meteorite hit the aircraft, the plane game: meteorite to keep the whereabouts of the plane up and down and move around to escape through the meteorite. To find the bitmap handl