It's an interesting game. I'm mildly stupid, so I could only get to level 15. I read below how you coded it in such a way that you have essentially infinite levels, very good plan to get more gameplay out of your idea! For me, I think it would really benefit from sound effects, even something very simple that you generate in 5 minutes at https://sfxr.me/ would really up the feel of the game; I know that there's not a lot of time in a jam, and you had to prioritize. The cards and the color palette are nice. Nice work. :)