From the game's rules:

This is a game designed to be fun. You have dice, you’re going to play with them anyway.
Now you have a goal.

Make dice towers, roll high numbers, spin dice, and evolve.

Players start out with the d4, and fight their way up through the evolutionary chain of dice; d4 -> d6 -> d8 -> d10 -> d12 -> d20

The game is made up of two different sections in each evolution; the quests, and the challenge.

• Quests are undertaken in order to obtain bonuses to rolls which can be used in any of the upcoming challenges.
• Challenges are undertaken when the player feels they have enough bonuses to defeat the next die in the evolutionary chain of dice.