I really enjoyed it! The game has great potential; the most important thing is that the core mechanics are already working.
I liked how the theme was implemented, especially the little comic at the beginning. It would be great to add more of those for wins or losses later on so we can see the characters interacting - they’re just so cute.
The one thing really missing is card descriptions. It wasn't immediately clear what the numbers meant or where the mana cost was indicated. I still don't understand some of the values, but I’m still managing to win.
Great job anyway!