Really lovely looking game! The first room in particular was really striking when I first opened the game. The colours and surrealism and animals created a very unique atmosphere. (There was so much going on that I had some pretty bad performance issues at first… I figured it out though!) I really enjoyed the Alice in Wonderland-esque setting and the cute characters. As a musician the music puzzle tickled me as well, although I imagine it could have been very difficult for some people.
I do think the game is a bit unfocused. It has so many mechanics - a piano, platforming, solving a maze, upgrades from the witch, etc. - but none of them really go anywhere, and they don’t work together. I think you could make a really neat puzzler about helping a witch in a magical forest, but I think you would need to decide on a vision for what you want the game to be.
Good work overall though! I’m always impressed by nice 3D graphics in a jam.