Astral Tower Defense

Astral Tower Defense description:
The attacking space creatures are called creeps. You should defend your homeworld from them. That are determined to destroy the planet at the end of the pathway. There are the asteroid fields. You should build and upgrade gun turrets and other equipment on them. These asteroid fields surround the path to kill the creeps before they succeed. There are 10 attacks, which the planet can withstand, before it’ll be destructed.