Tower Defense: aliens attack.

Shoot from the cannon at the aliens attacking you. The more powerful the weapon you choose, the easier it is to defend yourself.

This game is a tower defense simulator. There is an infinite war to protect the ancient planet. Your gun is being attacked by aliens from their spaceships. The defense of the tower will be more effective if you use faster projectiles, and you can also buy a double cannon. In the latest version of the game, the most powerful weapons are initially installed, as well as an infinite number of lives.