The helix structure could also be considered a ladder. The narrative that springs to mind is ‘Jacobs Ladder’, a form that is said to connect heaven to earth.
Jacobs Ladder by William Blake
Deploying a ladder structure provides ‘waypoints’ that are T junctions. The player makes one of 3 choices, to move forward and upwards, backwards and downwards or take the tunnel through to a parallel path which could offer different experiences.
