This was a very cool concept! It was fun to explore and the music and the visuals were very nice! I really liked the way the piano chilled on the same base note, it somehow fit very well the chill gameplay and slow walk speed to have the music move very little harmonically. There are two things I thought of: sometimes I got stuck for a second because the roof was too low, or because the gap I was aiming for and the wall I was jumping from were only one block apart, which was a bit frustrating since this platformer otherwise isn't very technical. That made it feel more like an oversight than conscious level design. Also the movement speed is very slow, and then you get the dash and it's like wooooosh. I think the movement would benefit from reining in the dash a bit and instead making the walk faster, considering the long segments you pass before you get the dash. Maybe the wall jump could come with a secret walk speed increase as well? It was very nice though that you could just zoom up the stairs using the dash. It was a great experience, and the vibes were very nice!