Interesting concept, I believe the difference between the jump speed and walking speed is a bit too much as the walking speed feels very slow. It is quite tough, i think the adding of a background image or maybe a parallax background would go a long way and also adding in like an underfloor asset like some dirt underneath the floor or maybe moving the camera more up so you don't see that part of the game. Other then that I think this game is quite fun and with a bit more polish this could be a great game to release. (P.S Couldn't get past Level 2 >.< )