Interesting first-person experience game. Not sure if it had a theme/narrative that joined the levels together, would help it if did. However the biggest issue is a lack of sound. If there was any I didn't hear it. It would have added so much more if your movement and jumping had sound, along with the environment. If this were a 2D game, I would describe the wall jumping as being pixel-perfect (unforgiving). Definitely worth further development!