Hello there! I'd like to try your game, but you didn't build it (I can only see the source code). It would really help me and probably others if you did. Reply on this comment if you do and I'll give it a try :)
Got a change to try it, you did a good job! Music gets along well with the mechanic, so you nailed that. One thing that I think would amp your game up is some feedback when you get the notes right (and possibly feedback when you get them wrong as well).