I love the art and the overall presentation of the game. However, as a rhytm game, you should give more attention to the gameplay itself. For example, in level 3 the difficulty instantly rises up a lot, because the notes are visible too late. I would handle it so that the notes are always visible a long time before they arrive, but that they just get more and faster over time. Also, maybe a nice positive sound that plays when you hit a note perfectly would be cool, though it's also really hard to hit a note perfectly. Besides that, the notes don't really match the music.
Other than that, as I said, the presentation and art of the game is astonishing, the devil is funny, and the menu you made is very polished. Amazing work there. Well done!