What it means

Elemental - el·e·men·tal - adj.

a. Fundamental or essential; basic.
b. Of or relating to fundamentals; elementary.
c. Constituting an integral part.

Maze - maze - n.

A graphic puzzle, the solution of which is an uninterrupted path through an intricate pattern of line segments from a starting point to a goal.

A web site can be simple and basic (Elemental) and very appealing visually. Navigation throughout the site or (Maze) of pages and links should be intuitive.