Impressive amount of work on your part! It's always a challenge to implement several different gameplays into a single game jam entry, so good job for managing that!
The end fight was the least interesting of the three in my opinion, but the inventory cleaning gameplay and of course the rythm game were really cool.
The flute keys displays being at different heights made it difficult for me to concentrate on the actual horizontal line that is used to time the key presses, but that is just a small issue that might not even be one for most people ;)
Good job!