hafrogman
Adventurer
You could use a similar concept to plot out a slightly more ordered area, not quite as strange as Labyrinth, but a little easier to comprehend.I'd suspect coherent rules would defeat the purpose of such a place where earth and sky is not always parallel.
A random thought: Character chooses 'intended move', DM rolls on this chart, adding +1 if the character is running.
Divide the whole space into eight different zones. Laid out something like shown in the attachment. There's also six different directions gravity can be for you, personally.
Say you start out in Gravity 1 (G1), Zone 1.
From each point you can either interact with your own zone, or try and reach one of the others. You have a few different exit strategies.
Stairs
Doors
Jump
Stairs move you diagonally and change your level. Stairs connect Zones 1 and 7, 2 and 8, etc. Your gravity stays the same.
Doorways send you somewhere random.
Gravity Orientation 1d6: Zone 1d8.
You can try and cheat the system by jumping down, up or across to some other zone, but if you fail you end up in a random point (as if through a door) and take falling damage.