Interesting experiment, but not a fun experience yet.
The music gets a bit too glitchy to the point of hurting, even tho the music itself is a good match to the vibe.
Having attack values is the biggest minus i would say. Hide them so players would actually read the cards and figure out how to win. But I guess this way it's beyond the jam limitation.
So as a vibe-filled experience of a game it kinda fails because shows how it works way too soon.
Oh, and you can let people construct the deck before the run. This way they'll have more agency and they'll be able to role-play!