Feels incredibly shallow.
When I see the title "Dungeon Dice", I come in expecting that it will have a fairly big element of luck to it, with some added tactics and rewarded abilities to give you some feeling of control. Problem is, there are no tactics, and the abilities you get have such little impact on the game that the only thing which stands out is the luck element. Battles are simply not engaging; you are expected to just click in the center of the screen until the battle is over.
There are some very obvious improvements that could be made to this game. First, the addition of dice right now does nothing to change gameplay except tip the odds toward and away from you by some indeterminable amount. All the dice should be used, not just the highest-scoring ones. And you should be able to choose which dice attack which in one-on-one battles, so you must make the choice between playing offensively or defensively at any point. (Having potions of some kind could add weight to this decision.) And if it's AI programming you're worried about, just let the player choose which dice will fight which. I don't think many people will complain.
The power-ups are also mostly meaningless because whether they are useful or not depends on an unpredictable outcome. Instead, the abilities should be applied after the dice roll, but in turn cost more to use. This way, you actually have some control over how useful your dice are, but you have to carefully budget this power so you don't run out of it when you need it most.