Cannon game requires the player within 10 seconds to destroy the target of a seventh body, the touch screen to aim, double-click the screen fired artillery shells hit the first target extended the period of 3 seconds each hit once interceptor shorten the period of 2 seconds, the player mustdestroy all targets before time runs out, if the time reaches zero seconds, the player failed.
加农炮游戏要求玩家在10秒之内摧毁一个七分体的目标，触摸屏幕进行瞄准，双击屏幕发射炮弹，每击中一次目标时限延长3秒，每击中一次拦截器时限缩短2秒，玩家必须在时间耗尽前摧毁所有目标，如果时间到达零秒，玩家失败。