thank you very much for trying out the game ^_^ The bug comes from notes not removing their collision when when you pick them up. This is just a skill issue by my hand as I couldn't figure it out in time and thought that it's ok to still have it in because it does not affect any progress in the game and hopefully does not cause any nuisance. I also do not know if we're allowed to edit the project after the submission timeline >_< - From main programmer