Really cool! I didn't love being able to be hurt by my own weapons. Also it's pretty difficult to keep them away from the tower.
I think the towers that come from the die should be more varied and powerful. Although I probably didn't play long enough to figure out what each one does.
I liked being able to chuck dice at the enemies to hurt them though that felt like it balanced, but I think it would be awesome if the player could recatch the die after throwing if they get it before it lands. That way there would be some skill and thinking involved in deciding to keep throwing the die and using it as a projectile or letting it land.