A neat idea in concept, but I think this falls victim to the most difficult part of this theme - randomization. Because my move is chosen at random, the order in which I select them has no effect at all on the outcome.
The order of attacks and outcomes could also be more clear - because I need to hover over the player / enemy to see the health, I can't easily see what the outcome of a turn was.
I do like that you could get buffs after each victory. That seems really interesting, but because there was no real strategy, and everything was randomly determined, I couldn't get past the second enemy.
Without the strict limitations, I do think this concept has potential, something involving a dice that has classic RPG style attacks on it. Also, the art for the angel enemy was really cool!