Nice. I never thought to do an isometric maze, but I've made a few flat mazes and impossible shapes with isometric grids (digitally). Dig the gradients.
How I understand this kind of maze you walk up on the wall. But how can I create one where I walk between the walls? I hope you understand my question... :-)
To walk between the walls, you would outline the path to follow, and instead of making that part 3D by adding vertical lines and height, you would make every other part 3D.