Love me some deckbuilders! Great cohesive style; a clarity of vision is apparent in the art style. A bit on the easier side, but imbalance is to be expected given the time frame... and to that point, I think there may be some cards I didn't see after one playthrough which is pretty impressive for a game jam!
Hope to see this built on after the jam! Would certainly sink a bunch of time into this if it had between session progression, branching paths and that sort of thing.