This has a very neat feel, but it's not really on topic for this jam.
The card gameplay kind of works, but even after having won, I'm still not sure exactly what's happening. I see that after playing 3 cards, the opponent does too, but is there some kind of MtG/YGO match-up happening where one card's defence blocks another's attack? Some more visual communication with how a turn is being resolved and the effects on each player's health could really elevate this game. There's also no reason (as far as I can see) to not simply play your 3 highest attack cards every turn, which makes the 1 attack/1 defence cards essentially useless. Saying all that, the art is really nice, and I'm curious about the world itself!