Love the Gameboy aesthetic, it really fits this type of game. It's visually lovely, and the music is good too. This has really great bones, I'm looking forward to the full version.
I think it would be more fun if the turns went by a little faster, maybe cut out the 3-2-1 timer when you're throwing out your move. Might also make the game less frustrating if you did chip damage even if you lost a round.