说明：  太空战机和其它射击类游戏差不多，通过键盘上的数字键来控制玩家所使用的飞机并发射子弹。玩家可以使用键盘上的W（上），S（下），A（左），D（右）键控制飞机的移动，键盘上的G键用来发射子弹。这些设置是默认的选项，不过我们也考虑到一些玩家可能不习惯这些按键，因此我们将选项（OPTIONS）设置为可以让用户自己选择方向键和发射子弹的数字键。
(Space planes and other shooting games is similar to the number keys on the keyboard to control the players used by the aircraft and fired bullets. Players can use the keyboard on the W (on), S (next), A (left), D (right) key to control aircraft movement, the G keys on the keyboard to launch a bullet. These settings is the default option, but we also consider that some players may be accustomed to these keys, so we will be options (OPTIONS) is set to allow users to their choice of weapon fired the arrow keys and number keys.)