Very interesting game and such a beautiful melody. I found it very difficult to solve the puzzles and didn't finish the game since I couldn't figure them out but even though it was hard I did enjoy the game :D
I don't know if you've heard of Game Development World Championship before (gdwc2019) but it's a competition for indie game developers where they can submit their games and it's free! It's great if you want some more visibility for the game and it only takes a couple of minutes to join :)