Me before I picked up the weapon: "Aw, it's nice how you bounce off the walls." I regreted it later xD.
The shooting can totally just randomly kill you. I found it hard to use. Some parts were fun, others were just rage-inducing :).
The colors are great! Maybe you could have sticked to an even smaller palette - the blue and orange feel a little extra. The background is a bit messy, but it gives the game a cool look! Nice game.