Beautiful game. Liked how fast-paced it was and power-ups idea gives the game a lot.
Would have liked to see the power-ups you got to show up on the UI. Fun to see how much gun speed or movement speed you have gotten. Or maybe show it at the end of the level.
Felt the negative pickups did little as you could just grab everything and you would always end up with a positive in the end with everything.
Really good job on this game, Keep it up.