Tower

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0/0 arrived 0 on stairs 0 waiting leg 1
Stairwells — tap one to close it

A closed stairwell stays walkable but becomes expensive, so routes divert to another and anyone already on the stairs can still walk down.

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What this shows

The world is one tess world six floors tall, not six stacked two-dimensional maps. Floors are separated by solid slabs, and the stairwells are the only tiles that connect one floor to the next, so an agent crossing floors is following a single route through three dimensions rather than being teleported between levels.

Every floor carries rooms and wide corridors, and two of the four stairwells serve each floor, alternating as you climb. An agent arriving on a floor therefore lands at one stairwell and must cross the rooms to reach the next one up, rather than riding a single shaft from bottom to top. Close a stairwell and watch the routes redistribute to its partner.

This is an early version: the geometry is deliberately simple and the camera is fixed to four orientations. See the colony demo for wall painting on a single floor, and the congestion page for pricing policies.