Great effort. The presentation is excellent, especially animating all the randomly generated sprites, and the 3D dice rolls still feel nice and smooth on top of the 2d pixelated graphics.
The gameplay is simple but I found it quite addictive (played 5 or 6 times, highest level I got past was 10). However after a while it got repetetive, I found the best strategy was to stay still and roll the attack dice until I got enough ranged attacks to pick everyone off which does get old after a while (shooting 2 enemies at a time is very satisfying though!)
I'd suggest adding a healing spell, and maybe letting you hold onto a melee attack in case an enemy comes in range next turn. Also some music would be good too.
Further development, maybe you could add loot pickups with potions / power-ups?