The music is very beautiful and the mood is very calm and nice in the beginning. It becomes deviously challenging. However, I do think it's a bit hard to judge certain jumps/collisions, it looks like the character is hovering over the ground, but at the same time it can pass through the tips of the ceiling. In general I do like the peaceful and zen-like quality this game exudes. But it does feel unfair and frustrating at times.
Either way a really good job :)