That was fun! I wish it had some music and some SFX to go with the animations but I had a great time. I think the fact you can move during rolling should be a bit more explained (maybe as the first die flies out of the ground) cause I didn't understand until I pushed buttons accidently and saw I could control it. Also good idea to add targets around.
If you wanted to expand on this idea, I think something really cool could be if you could customize the die that you have to roll, or maybe even add in more dice to get better numbers, though that might make the rolling to hit a target harder. Just an idea so the game has less reliability on luck to do damage. Plus it gives the final good 'ole rpg element of grinding for op gear element.
Good job!