The usual platformer, but it needs some work.
You should really have the camera start moving when your character gets into the center of the screen, not almost all the way to the right, it makes the game nearly impossible to do unless you know what's coming.
I'm aware that it's a prototype, and because of this, I have to say it's quite good, when the real one comes out that should be worth a real play through, also, work on developing some sort of storyline for the game. "You are a career bassist, but when you go to check online for some new tabs you find that the bass has been erased from the world, go find bass clefts to restore to the world the glory of the bass!" or something to give a purpose to the game.
Also, if as you started the game, the music is more high pitched, and as you go through collecting the bass clefts, the music becomes more... Bass would be a nice touch.