一个java编写的小游戏，用户使用一艘小飞船射击小行星。很简单。-this is a simple casual game, user use a spaceship to shot planets

HTML5保卫星球射击小游戏基于HTML5 canvas制作，星球防御游戏，太空战机为阻止星球遭遇小行星撞击，进行击毁小行星的游戏，鼠标左键点击发射子弹。(HTML5 defend planet shooting game, based on HTML5 canvas production, star defense game, space fighters to prevent the asteroid encounter asteroid collision, asteroid destru