that was it? damn.

I really liked the art style of this game, complete monochrome with a limited sphere view. The choice of music was good, I felt it added to the tension as enemy waves get stronger.
My only concern is - There was no feedback when the enemy took damage. So when the stronger waves came, I couldn't tell if I actually hit the enemy or missed him. Maybe make it flash red or add a 'hurt' animation?

Absolutely loved it!