Great game! I really liked the concept of the puzzles and I did fins it quite difficult but it was a lot of fun to play. I also liked that you could still move on to the next level even though you didn't finish the level before. The art style was nice and simple and overall this game was a very enjoyable experience :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 :)