Very good! Very creative mechanic you got there, the possibilities for more levels and mechanics are endless. I also absolutely adored how the music kept getting new instruments and tracks layered on top of the previous ones as you advance levels. The graphics were simple and effective, with each level having completely different colors from the previous ones, which makes the visual clarity really good. I didn't had many problems as I played it, it controls well, looks good, sounds even better and the main mechanic is brilliant. Amazing job!