Good job! As others have said, it reminds me of Paperboy (although it's been so long since I've played it, I don't remember how similar it actually is). I think the background resolution should be brought up, as I had difficulty knowing what's what. I also expected that I would have to use controls to balance on the bike without tipping over (in my case, it was a relief that you did it the way you did, as my coordination with that kind of stuff isn't that great so it was better for me that I didn't have that in the mix). I enjoyed the sound, and thought it was a nice touch that the music changed as my time was about to run out.