Wow, the presentation and polish is really impressive on this one! I would definitely play this if it was expanded into a full game, I love the idea. Seconding that I didn't quite understand that cards had costs until reading the comments, which made the game a bit tougher. I really appreciate how you handled the turns/text, where you only advance when clicking and can go as fast or slow as you want - I've played too many autobattle games like this where you have to watch every little move. Really adore the artstyle. I'd say this is probably my pick for hidden gem of the jam. Surprisingly strategic too. The game gets complex a bit fast, and I'm sure that's just because of it being a jam game. If expanded a bit more with a few more intermediate fights the complexity curve would probably feel pretty good.
The card sound effect is also *chef's kiss*, I don't even know why but it's just so good.
I really hope you expand this one out a bit more!