Fun idea, couldn't really defeat the first enemy because i don't think i got the combo system fully, but i got the gist of gameplay loop. Nice music although it didn't loop so it just stops when it ends.
For the cards, the only gameplay affecting information is nr and cost so the rest of the card is just decoration, which seems like a bit of waste, maybe cards have description that gives weird effects or something.
Nice lighthearted theme for a card game, perfect for game jam. Good job!