The graphics are really awesome!
It really needs some audio though, and better hit feedback. After playing a bit I figure that the player character is losing so much health immediately it is almost like it's in a 5 second loop. I do wish the dice would come back from wherever it goes when you press the right mouse button, because there are times when my awful aim has launched the dice out into the nether. The bounds could really use fixing up too, as the enemies get up and run out into space whereas the player only falls.
Great job! It's playable and fun and I can see that you worked hard!