Your job — You are not the owner. You are the steward the residents elected, and you hold the treasury in trust. Everything you build, they live in.

Confidence is the score — Not profit. It rises when people are housed, can get around, can see a doctor, have somewhere to gather, and can afford to stay. The bar at the top tells you where you stand; hover it to see what the assembly likes least.

Homes are allocated, not sold — There is a waitlist. Build homes and households come off it. Dues are set per room in three bands: Reduced brings in less but houses far more people, Full share fills the treasury and prices people out.

Building — Drag Floor to pour space (the ground floor is your lobby). Co-op workspaces pay a share of their surplus. Canteens, cafés, stores and the cinema are run at or near cost — they earn little and are worth a great deal.

Getting around — Drag elevators vertically. Express elevators stop at the lobby, basements and every 5th floor; service elevators carry staff only. Stairs and escalators take the short hops and relieve the queues.

The assembly — At every quarter close the members meet. They vote on major works you propose, they can set you a mandate with a deadline, and if confidence rots long enough they can vote you out. Click Confidence in the top bar to see what you owe and what is waiting on a vote.

Getting around, higher up — A Sky Lobby is a two-floor concourse that every elevator stops at, expresses included, so a long climb becomes two short ones.

The building tells you — Each morning the Assembly Bulletin collects what happened, and the Co-op Gossip feed along the bottom carries the rest: what people said, what the papers printed, and what needs doing.

Trouble — Fires spread until the Safety Team contains them. The treasury is meant to circulate; hoard it and the assembly will vote it out the door — to the school, the library, a sister co-op — and thank you for the surplus.

The summit — A building that houses people well enough, high enough, attracts a public science grant. Crown it with the Observatory and the astronomers arrive.

Controls — Scroll to zoom. Pan by right-dragging, holding Space and left-dragging, or with the arrow keys. P pauses, M mutes, Esc closes panels. Number keys pick tools.

Some say the old codes still work.