Cool music. Nice and colorful, with bright easily recognizable objects. I can see the potential for some rocking action here.
Unfortunately, there are a few issues that get in the way of this being as fun as it could be. Here are some suggestions:
1. The player should be confined to the camera's field of vision. I was going out of bounds, and then I couldn't return, because I couldn't see which direction I was facing.
2. The R button should work at all times, not just after a Game Over.
3. The win and lose conditions should be communicated a bit more clearly.