Super pretty game, there is no doubt about that. I'd love to see the health bars swing up and back down in between battles, to give that extra feel that they are on strings.
It also wasn't super clear inside the game that the other dice added to my ability. It looks like you tried to do that with the different colours and the dice flying up. I think you could make this even more clear by having the dice be thrown at the enemy for damage or at self for shield and health. Or possibly the animation is the dice combining in the value for the damage you'll deal.
The combat feels like it goes on a bit too long, almost like every opponent is a boss. I also wasn't sure if my shield was supposed to go away and his to stay between rounds. Finally, I feel like just surfacing the health information number and damage number to the player would be super useful for strategizing.
Overall though I really liked it, the art style continues to blow me away. Really unique concept for a game!