A concept sketch for the map. Each of these regions would be clickable, leading to a map of a portion of that realm (if we need more space, we can always add movement to different directions and not add the borders of the domains, so there is always more of a given realm to be explored)
The world would be a kind of disc with the cardinal realms being what lies beyond the disc.
Entropy: As you go further in this realm, reality starts to warp itself until it ceases to exist.
Aether: Shattered fragments floating perfectly still on nothing. If you go further enough you start returning to the starting point.
Time: The world starts to shatter here, turning into a huge sandstorm. As you go further, time starts to move slower until it stops flowing at all.
Gravity: Small planetoids keep in a never changing movement. No matter how far you are in this realm, you always get pulled back to one of these planets.
Inside the disc the other elemental realms follow the features of the world
Life: A huge jungle
Light: Plains where huge crystals rise to the skies
Death: A wasteland, where the elementals bury their dead
Darkness: Swamps and marshlands where light is always very dim
Water: A lake with islands
Earth: A mountain chain
Fire: Volcanos and fiery pits
Air: Plains where floating islands can be found, connected to each other by bridges
Potatotal island is what holds the disc in place and you would go from to the other by a portal