游戏中有各总各样的敌机和武器, 敌机按一定的几率出现, 玩家消灭敌机后可得分数奖励, 达到一定分数后会升级, 游戏难度随着玩家级数的增加而增大.-Total a wide range of aircraft and weapons in the game, the enemy at a certain probability, the player to destroy the enemy can score bonus, reach a certain score after the up