That's impressive and ambitious to create a card game, and for you first game jam !
The art is nice and has a lot of personnality. But the game misses a bit of feedback to really understand the action. (But thats and hell lot of work !) And those damned cards which always are on the way, hiding the foe's info. It looks like you have struggled with that...
I'd love to play more, when (if) there is a more developped version.