It took a few turns to figure out what was going on, but once I got it, it was pretty cool. I like the concept of rolling hit points and then deciding which of your units gets what, and also choosing between element or health dice at the end of each turn.
But I do think the battle phase could be a bit more interesting. As it, it's more or less just hoping you roll the winning element and putting it in the appropriate place. And if you get the right roll, there's not really anything the CPU can do about it.
If you were to do more with this, I wonder if having the players take turns placing dice could make the battles more interesting.