游戏规则：

按w键是控制自己的飞机(天使)向上。

按S键向下,A键向左，D键向右，r键重来，e键退出

发弹：指着本程序介面按鼠标左键.

开始时：你的生命值只有3，而子弹数只有2

当你的子弹射到了敌人时,敌人的生命也会减一，当敌人的生命值减到0时，你就赢.

当你的子弹射到了敌人时,同时天上也会掉下一颗子弹，当你捡到一个子弹后，你的子弹数得到补充；

如你的子弹数减至0或你的生命值减至0你就会输。

秘技：

按y键你的子弹数就加1；

按o键你的生命值就加1.

不过如果你技术好的话唔用秘技也能赢。-rules of the game : w keys on the control of the aircraft (Angel) upwards. According to the S button down, and left keys A, D keys right, r bond return, e withdraw from the key rounds : Pointing to the interface procedures by the left mouse button. at the beginning : you only have three lives, while only a few bullets when you two bullets to fire at the enemy, the enemy of life will lower one. When the enemies of life reduced the value 0, you win. When you fire the bullets of the enemy, while the sky will fall a bullet, when you picked up a bullet, you get to add a few bullets; if you reduce the number of bullets 0 or your life value to 0 you will lose. Camp : y keys on your bullets on the plus a few; o bond by your value on the lives of an increase. But if you take good technology used ca