I think most of what I have to say for improvements have already been said so I'll start with this. I think this game has a lot of potential. I absolutely love RPG Card Games so I was excited for this.
I love the artstyle! Gives me major retro gameboy vibes! The graphics and music I think perfectly fits the aesthetic.
The main issue I have is what has been said already. Gameplay is super interesting of a concept. I don't think I've seen some of these card mechanics before. With that being said, it needs to explain it a little more. as the others pointed out, its hard to see what stats cards have and hard to see if anything even happened after the round.
Overall, I'd rate this one a 4/5. Very awesome job and I'm looking forward to seeing where this goes. I definitely think if further developed, it'll go places! :D
Please consider trying out my entry as well if you have the time.