You write the rules that run the lifts. Every building adds a new kind of trouble. Start small at Number Nine, or go straight to Exchange Tower.
Offices and a café, two lifts. Learn how a lift thinks.
Bed lifts, and emergencies jump the queue.
Luggage slows everyone down. Breakfast is at eight.
Offices and a hotel, all waking up at once.
Five lift groups, a sky lobby and double-deck shuttles.
Destination keypads, and two lifts sharing one shaft.