Nice game and a very creative idea! I like the simple art style and music, it was just an overall nice game :D
How long did it take you to come up with all the levels and puzzles? :)
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 :)