One thing I really respect about the design of this game its its accessibility. Everything plays fast for its concept. Die rolls happen quickly and cleanly, instead of being a dragged-out affair. The dice roll concept is integrated well with it influencing failure and success of hits but more importantly the quantum of attack to make it a little more varied. It also makes it really easy to have progression and upgrades make a tangible impact.
For constructive feedback, there could be some adjustments to the visual presentation to make it consistent; some sprites have a much more detailed design than others, and the backgrounds are simple, which don't clearly identify edges into new areas. I think the cleaner pixel art has a nicer effect than the ones going for a realistic effect. Still nice!