Really creative concept! I'd like to mention some problems that brothered me a little, including a lack of variation in the soundtrack and some gameplay problems, especially in a few levels with harps. Sometimes, tuning them becomes a huge challenge since it's very easy to being unintentionally pushed or tune one of them by accident, so i have to be extremely careful. Despite the problems, the game is really fun and challenging and it has a lot of potential. Good job!