Interesting choice of piano music! Fun little art style and definitely a lesson that needs to be shown to the real world. The only I have to say is the character's ability to jump to the side of boxes and underneath them felt a little odd (as if the character is flying). An alternative solution I would suggest is coyote time, jump buffering, wall jumps, or maybe even climbing (movement similar to Celeste). Other than that, I love the little character and the creative idea of a flute! The flute is really the focal point of the game and maybe tying in some art about flutes will further deepen that concept. Great job! Creating a game in only 9 days is extremely impressive and you should be proud of yourself!