Thanks for playing and for the detailed critique; honestly it's mind-blowing to me that someone not only took a few minutes to check the game out but also write up a whole document!
I don't think we have any plans to turn this game into a release, but if we did, we certainly have some good case notes to turn to now!
You're 100% right about the lack of audio feedback on hitting notes or not; we had the audio files prepped but it was one thing too many sadly (we submitted this at 2am GMT Friday, so I was too shattered for more programming lol!).
This is what game jams are all about though; experiencing others ideas and helping each other become better. Thank you for playing and submitting too!