The art style is absolutely beautiful! I love it. The cards themselves, but especially the back of the cards looks super cool! And the enemies are adorable! I love this so much!
I think a quick tutorial would've been nice. It's mostly self explanatory if you read the description, but for example, I don't know how often you can use power and items and how you can get more (well, just in the first round to be fair, then you figure it out). I only saw it later, but the reference cards are super helpful.
It was quite funny to me that I could use "Magic missile" on myself xD
Anyway. I absolutely loved the game and I really hope to see this be turned into a full fleshed out game!