I had a lot of fun playing this game, it is one of my favorites so far! Nice usage of the themes, the flexibility of the dice as a tower or just as something to throw at the enemies is great!
Please add: (1) more levels, (2) fullscreen option and (3) support for other keyboard mappings (e.g. allow the arrow keys as directional keys and use the physical WASD [but this is an issue for user of Dvorak/Colemak/Workman/... keyboard mappings).