Nice little game with a lot of personality! Unfortunately after getting the violin the game hard locked me inside the red blocks so I wasn't able to finish the game.
Looks like you had a lot of ideas and features in your game. Unfortunately many of them weren't very polished. Jumping felt weightless, character's shadow didn't always appear underneath and movement speed in general was very sluggish making the game feel very tedious and slow. I would highly recommend spending more time tuning the character's controls to feel nice to play when making a platformer. Graphics and characters were very cute and the instruments with different powers were fun to use, they really carried the game.