Alien Invasion Game

On your home planet was invaded by evil aliens. They want to enslave the peaceful inhabitants of the planet. Stood up to protect the planetary forces. They will be able to repel the attack of the aliens and save the life and liberty of all citizens. However, they need your help. To do this, take over the management of a gun, which is able to penetrate the armor on an alien ship. Try not to let them get too close.