Equip your spaceship and defend the Solar System until you are a colonel.
Features:
- 3 difficulty levels
- 5 types of upgrades
- 11 bosses (at insane mode)
Equip your spaceship and defend the Solar System until you are a colonel.
Features:
- 3 difficulty levels
- 5 types of upgrades
- 11 bosses (at insane mode)
