It's a nice little platformer with nice music and a cool gimmick with the music building up as you play.
Restarting to the very beginning of the game upon each death feels a bit harsh, even for a small game like that :) Adding a checkpoint after each full melody is added would be a good idea :)
Having died 2 times before the final instrument I just don't feel like replaying the whole thing. It could be just me though :)
Otherwise, a nice little game that hopefully will get some attention!