I really liked the visuals and sound design of this one. I found the enemies to be waaay too spongy though. I know you get to upgrade your gun later but I'd prefer the enemies to have less health. I also found the jump to be too floaty considering all the small jumps you find throughout the game.
My final issue is that the gun seems to have hit registration issues. You can reproduce it by shooting a wall at close range. If the right side of the camera is closer to the wall then the bullets shoot way off to the left, away from the crosshair.