I love this idea, and I think with some polish and a simple meta-game with things like training and building your deck over time, it would be a good game to sell!
I totally missed the explanation of the stats at the beginning, so was confused on my first round. Adding some UI to show what will happen when a card is played (a la Slay the Spire) would help a lot. I'd also make some sort of standard icon/keyword for "will throw a punch". It was unclear if a card would trigger an attack.