No way to exit the game from inside the game, not on main menu or in pause. Or a way to get to main menu from pause.

Beat it, took about 5 minutes. 

Bare bones, little thought to enemy placement or ai, or level design.

Not even a Demo.

Guns felt okay, and it being a cooldown/overheat mechanic felt neat.

1 star instead of 0, though. For effort