Very beautiful game, I love all the art and designs for the monsters.
The song is also a bop which helps.
I think I had a similar problem to other people that the screen was too big, zooming out helped a little but it cuts of parts of the screen. You can test out turning on the full screen button in the settings of your game on Itch, changing that doesn't invalidate any of the rules of the Jam as it's not changing the actual files.
I got to a point where it was warning me about the mutation level and I needed to hold right click on a card for 2 seconds to discard the mutation but I couldn't quite make it work, I'm not sure if I was doing something wrong there.
Despite those small issues I had a lot of fun and was able to complete it on the second run. Although I think I cheated because on the second run through I already had some of the mutated cards from my previous run.
Very nice work.