Game controls: control the direction of the mouse, according to the space bar, the left mouse button aim at the flying saucer shooting.
游戏操作：鼠标控制方向，按空格键开始，鼠标左键瞄准飞碟射击。
Game controls: control the direction of the mouse, according to the space bar, the left mouse button aim at the flying saucer shooting.
游戏操作：鼠标控制方向，按空格键开始，鼠标左键瞄准飞碟射击。
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