Overall a pretty cool game. Level 2 was a bit annoying in that I knew I had to get all the keys and they were all visible. There was no sense of mystery so it didn't spawn too much excitement. For the last level, I think there was a bug for the key collection because when bumping into the yellow, key, it would just collide and not collect the key. I couldn't get past the really big yellow door. Also I noticed that for the last level, when the camera movement was based off the player, when shooting, the camera would jitter. I assuming this was due to the camera tracker the center of the player which had the bullets as its child. Other than that, it would be nice to have health.