I really like the idea of this but unfortunately I really didn't understand how to get the notes to show up at the top and whether I was supposed to be jumping to collect them or not. They never seemed to do anyhing that I could tell. I want to give this game another go at some point to see if it clicks more as it looks great and the idea is cool.
Also I think you may not have made your music sliders logarithmic as the music seems to drop off very fast when adjusting the volume.
(edit: spelling/grammar)