Congrats on completing your jam game!
So, I love the idea of building your own die for combat. And the spritework is really cute and wonderful. But I felt a lack of direction. I didn't really why I would want anything other than attack, and when I tried to use D and H, they felt like they were always less than the damage I received anyway, making it feel pointless. That lead to me repeating the same inputs every turn which just ended up feeling monotonous and unrewarding.
Very cool idea, but it looks like you didn't get the time to maybe flesh out and play test. There definitely potential there!
Keep making cool games!