Oh crap, monstrous aliens have infiltrated your Moon Base...time for a shootout.
- Top-down shooter against a plethora of colorful aliens with distinct abilities.
- Navigate through multiple levels and rid this functioning, fortified factory of the invaders.
- Exploit a tragic flaw in the moon facility to help kill aliens and pass levels.
- There's a big boss, though it's not particularly difficult in this version.
- Uncover a rather dark secret as you progress through the game...who is the real monster?