Such gorgeous art and colours, beautiful work! I especially loved the transitions revealing the black on yellow version of the level art, so well executed.
The gameplay was simple, but with a surprisingly tricky difficulty curve, the king hiding some of the notes on a long sequence was brutal.
Only constructive feedback I can think of is that the upgrades felt somewhat unnecessary with the amount of levels, it didn't really feel like much was effective apart from healing if you had messed up earlier rounds.
Fantastic submission, thank you for making this!