This is really nice idea! When I first played I didn't get it but now I think it's really good. It's just that jump sound is very obnoxious, and the game is begging for a chiptune music of some sort. Add additional gameplay mechanics and you are golden!
Thanks. Yeah the jump sound can be annoying it was just a random sound using http://www.bfxr.net/
I've made contact with a very nice guy via GameJolt who has offered to make a chiptune for the game, just waiting for him to hopefully get back to me soon.
I did have a few ideas for some more interesting score combo's/multipliers but never implemented them.