Really fun game! I did get stuck on the "only one ___" level. I liked how you used the theme and that there were so many different ways to play the different levels. Overall a very fun and challenging 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 :)