Thank you for playing and for leaving feedback :]
I see how you couldve gotten stuck there, the playthrough video might be helpful in this situation, but I was hoping that the instructions inside the game would be clear enough. About the song not working, it might be because you weren't close enough to the character, only after submissions closed I realised that the song zones should've been bigger. The notes do have a short period of time in between when you cant play the next one, I get why it might be troubling when playing.
Im glad you enjoyed my game!