Press Space to fire your Anti Missile devices Keep an eye on your gun's temperature, as if it passes 99 degrees, you'll have to wait for it to cool down to continue firing it. The barrel will follow your Mouse's aim.
Just something I threw together while I was bored in school one day. Just a tip, try firing in short bursts to allow your temperature to cool between firings. If you keep your gun on at all times, you'll find it hard to defend yourself.
