This was a really cohesive experience! I really liked this idea. I feel like it stands out from the crowd of JRPG style games as the upgrade mechanic is really well thought out and actually involved dice!
A great take on the theme, and it kept me playing for quite a while! I still died at about 10 or so rounds in. My highest value was 3. From the screenshots it looks like it can get pretty intense!
Overall, excellent work