This game looks great, I liked the dice jumping into the tower animation. I loved your twist on the tower defence genre as well.
The difficulty (or the levels) was a bit high, I lost almost all of my health in the first couple rounds and got almost to the end with 1 HP left. Also, it was a bit difficult to aim the dice, although I kinda got used to it. And, as mentioned before, they take too long to explode after landing. Maybe do the boom right when they land?
These tiny issues aside, great entry with quite a bit of potench!