The valley floor is mud that swallows anything heavy. Build towers on the rock that pokes through it, hang rails, cables, cranes, tubes and drone lanes between them, and move goods overhead to feed the town of Tallow Rim.
A footing is a tile a post or tower can stand on: bare rock (a rib) or firm ground (a terrace). Mud (the sump) takes one only on a pile, a post driven down through the mud to the ground below, which costs extra and works only where the mud is shallow. Footings are scarce, so every route starts with a question: which ones can I reach?
Clay and peat come out of pits, a kiln turns clay into brick, and the town pays in scrip (the money here) for what you deliver. A carriage hangs under a monorail, picks up goods at one station and drops them at another. How many carriages, and where the rail splits, is yours to work out.
Each of the five Works is one valley with one contract and one new carrier: monorails over the Saltpans, a cableway across the Terraces, a gantry crane at Cliffworks, a pneumatic tube at Crest Instruments, drone lanes and one cable over the Long Span. Filling a contract earns Seals, four marks (Delivered, Lean, Quick, Clear) that you spend on patents, permanent upgrades such as deeper piles. Delivered opens the next Works.
A Works takes 25 to 60 minutes, and the game saves as you play. Nothing runs while you are away. This build opens with Works I, Saltpans; the later Works arrive in later builds.