What a pleasant surprise. I found your use of the theme to be absolutely spot on! You've used it in an original way that incorporates a fun mechanic which is easy to understand and fun to play.
I must add, at the beginning you see nothing but a level, not knowing what the mechanic, and controls are you are forced to figure it out yourself, also you only get to see the intro AFTER you've succceeded at that, I loved it! Very cool.