here''s how the universe of this game is set up: The planarverse (associate it in size to our universe) is a magically bound universe. The planarverse''s central source of energy is a star-like mass about the size of our sun, but burns much hotter and sheds much more light. Each world is a magically bound surface of one of the millions of cubes that surrounds this star-like entity. The cubes are heated by the magical energy that the star emits that flies through cracks at the joints of worlds (these cracks measure only a few inches). The magical energy that flows outward from the star-like entity through the joints of worlds is so powerful that any being that touches it is immediately annihilated. This magical energy also carries a tremendous amount of light that lights the worlds (they are never dark). The earth that a world lies on is supported by its contact with the magical energy from the star. At the bottom of a world, there is a tremendous build up of heat energy flowing that creates a red shield-like layer between the earth of one world and the sky of the other.

That sounds pretty out-there! Haven''t read much fantasy or sci-fi, but I don''t think I''ve heard of anything exactly like that.
Maybe a diagram would help to explain it.