First iteration: Creating the environment.

Environment is automatically generated.  Lots of debugging and size tweaking.  Limited player mobility; player is too slow and environment cannot be climbed.

Second iteration: Enhancing player mobility.

Replaced unclimbable "Part" columns with climbable "Truss" ladders.  Replaced solid cubes with "holed" cubes that allow the player to climb through them (only where necessary).  Converted walkways into conveyor belts to expedite travel.  Also randomized the colors of the environment to improve the aesthetic.

Third iteration: Creating interactivity.

Environment is no longer automatically generated.  Instead, the player must move to nodes and click them in order to extend the fractal.