What a good idea!
I quite enjoyed playing it and it is very interesting and patterns of playing card play a big part in the gameplay which is really nice. It is a difficult as well which is fine I think for this game.
I really love the art style, one my favs in this jam, however there are a few unfinished sprites in the game, which is fine but definitely post jam update thing.
My main issue with it was cards often time not playing or glitching even when I have my cursor hovering over it clearly. Also I would like to know when I can or can't shuffle, several times I lost a run because I tried to reshuffle when I could not.
But overall a really interesting idea, and a decent enough implementation. Great work!