Nice game!
I definitely raged a bit :) Shooting mechanic is a cool, I decided to spam click and use it like a shotgun, but having option to hold it for longer and use it like a sniper rifle is nice :)
Background is a bit tiring on the eyes, if you would set modulate color to something darker than white it would make it less noticeable and at the same time other important game play elements would be easier noticeable.
Cheers!