@@bruhbro1181 somewhat easier, but red notes are deadly when are trying to unlock it I would say low mid 16+ The hardest song is still Rrhar’il (mid high 16+) In fact it’s difficulty rating got buffed.
Maybe the red note will take 10 damage if the decision is "decrypted". When it is not "decrypted" you will probably take more than 10 damage. So you need to leave a lot of percentages before the last red note.
I just figured it out (I think?) All red notes need to be "decrypted." If even ONE red note was "received" the final note will result in a fail regardless of your HP.