基本射击游戏引擎可以自行编辑 而且很好用的-Basic shooting game engine can edit and well used

圆和矩形动起来，通按按钮来控制他们的动作，可用于射击类小游戏的基本思路。-The contral of circle and rect by do with the button ,this thing can be the basic thought of shoot games.