Prototype indeed! Not much to go off here with such a short length, but I'll try! Music and graphics are great; no question. I like the red.
It's a little to easy to get stuck in the walls with the way your character slides forward when you release a direction. I like the feel of the slide, but you gotta touch up those collisions so they won't move your guy forward if there's a wall or something in front of you. Other things uh - those disappearing blocks don't actually allow you to fall through em, the spikes don't affect you at all; yadayda... I'm sure you're aware of all these things. Touch it all up and you could prob get a cute little platformer goin.