This is quite a chill and visually stunning! It reminds me a lot of artistic games and of serious games due to the somewhat "educational" nature of it.
One advice I'd like to give is to avoid having the same repeated sounds, and when repeating sounds its nice to pitch shift them randomly so the player doesn't suffer from audio fatigue. This is really a minor thing here, but its usually a simple polish that can be easily done and helps alot!
Good job!