Operate guidebook: Mouse the left key shoot, move, the blank space key can pause, can choose bullet or reinforce star etc. while appearing red arrowhead under.
操作指南：鼠标左键射击、动，空格键可暂停，下方出现红色箭头时可选择子弹或加固星球等。
Operate guidebook: Mouse the left key shoot, move, the blank space key can pause, can choose bullet or reinforce star etc. while appearing red arrowhead under.
操作指南：鼠标左键射击、动，空格键可暂停，下方出现红色箭头时可选择子弹或加固星球等。
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