Cute game! Runs butter-smooth for me. There was no background music in the version I just downloaded; I had to hack the code and change the volume on line 26 from 0 to 0.25, and then it was grooving!
The controls feel good, and after a few tries I got the hang of it. My high score is about 5200. How'd I do?
I think this as a really nice first effort!