Wow! Awesome submission! The use of theme was solid, very simple but totally effective. And the execution of the game was so nice for a two-man job. I honestly think you could make a bunch more levels and turn this into a full release, definite scope for a commercial success. :)
I also liked the simple soundtrack, it added a low-level of tension and focus to the gameplay.
My only criticism was that the failure state should be a little bit more forgiving, so maybe you can go nearly half into the red zone before failing, rather than just slightly. If I didn't have more games to rate I could imagine being stuck on this for hours - really addictive game!