You really used the theme perfectly! I really liked this and it got more difficult in a good pace. I did get stuck at a few spots but I liked the challenge. The art style and music was really fun :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 :)