Hey! I like the concept of the game (I'm a bit of a sucker for puzzle games). I thought the final level with the timing challenges was a nice start, and I was looking forward to more puzzles from you:). The main comment I have on the game as it currently stands is that long tones over an extended time can be quite grating. Even if you added in just some variation like beats it could help break up the monotony of just the chord tones. Good luck developing!