Creative idea. The idea of being the combat mechanic itself is creative, and the design took it to some creative elements. The focus on the mechanics of combat is interesting and got my brain thinking. I do think having the numbers for damage, at least the range of damage, would help in the design to focus on weighing the expenditure and gain of AP. But I can understand why that was not a priority in development.
I like the simplicity of the UI, it works well with the concept. My gripe with it, unfortunately, is that the UI becomes white text over white-grey text over a black background, which made some of the text harder to look at and read. I think the game would have benefited from more purposeful use of font shadow, dialogue boxes, and such to make the text more readable.
Another nitpick I have is that it may have been helpful to have some in game manual that can help explain some of the stats and how they impact the combat. Otherwise, it became a guessing game based off of previous experiences with RPGs.
This game is rough in a couple areas, but it is an interesting and engaging game.