A very interesting musical game! I enjoyed it! It's really kind of a composition/music theory puzzle, I haven't played any games that do that. The consequence is that people who aren't musically inclined will have a difficult time with it, particularly with the jargon. I should note also that the audio feels a bit loud as the instruments get stacked on. I think this needed some more careful audio mixing. Or perhaps just some (dynamics) compression on the various instruments as well as the master channel would have sufficed.