The point is to score as many points as possible by moving and arranging the dice to distribute as much colour as possible or, alternatively, to arrange the colours so that you can clear yourself in one go.
At te relation:
1. dice often mean randomness, so the shapes and colours of the blocks are random.
2. the numbers on the blocks are not only decorative. They determined the number of points received when you destroy them.
3. through physics, one is able to make the dice rotate, i.e. "roll".