This is a nice little game! I love the way it feels.
It has some difficulty, not too much, which I think is good.
The jumping feels a bit off. I guess it is because I'm more comfortable with platformers that allow me to control how far and how high you jump by holding the jump button. You can find this type of mechanic in Hollow Knight and in Ori.
The music is not mechanical, correct? That said, the music is fun.
Overall, I had a nice little adventure through your game!