Overall, I'd have to say it was pretty well done. A few things I noticed, however:
The title and menu screens were pretty dull and not very inviting. When I first started playing, I already had a general idea of what to expect, however they were not very memorable at all and did nothing to improve the total experience of the game.
The mechanics were pretty well-done. I know you said it was inspired by Auditorium, however the gameplay was near-exactly the same as the aforementioned game. It made it seem almost like a clone instead of a tribute to the original game.
As I was playing through the game, I noticed that the music all sounded very familiar. I thought it sounded like Phyrnna's work here on NG. In fact, the third movement is very easily a remix of her song Sisters of Snow Dissent that was made back in 2010, I understand you said you made the songs yourself but a little appreciation to the makers of the original songs would be fair in this situation as well. I digress.
The music itself was very well-done, and being able to easily experience each "part" of the songs one at a time allowed me to appreciate them greater than if I were to simply listen to the entire thing at once.