The environment artwork is superb, the sprite placement could use some more polishing (the gun on the boss sometimes appear upside down). For some reasons the music was also too quiet and I wish there was more sound effects.
The gameplay feels fun at first but it became quite frustrating at the final (?) level (not quite sure if it was, but I got too frustrated before I beat the game). On the final level, you had to wait around too much before you can attempt your next steps (after you beat the first phase you have to wait for the wrench to be thrown before you can pick it up). I was also not sure at first about how exactly you can pick up the wrench after being thrown. You couldn't pick it up when it's in-flight, so you had to aim and wait for it to hit a wall. If you miss you had to reset the whole level (I know it was part of the design but it got too annoying with all the waiting for the enemy to get into position where you can both hit him and a wall with a wrench throw). Also I was also not clear on how I was defeated in the third phase (seemed like he hit my clone or something but that again feels super frustrating as an experience to play).