I'll have to admit that I couldn't figure out what was going on at first, with level 1. But I tried level 2 and things made more sense. It would help if there was some kind of background graphical reference so that I could tell that I'm moving or how fast I'm moving. I know there was that line, but it was unintuitive.
After I figured out that I was moving, then the game was very fun. I gave up on level 20 - came so close to beating it, but I spent too much time on it.
Here are my scores: