• Deliver parcels. Every city sends parcels to other cities — route each one to its address. Deliveries pay money, and reaching the level's target wins it (there is no time limit).
• Build a line. Drag from one city to another and the track lays itself. Grab a line's end to extend it, or grab its track to bend it through another city.
• Trains route themselves. They pick up parcels and carry them toward their address, changing lines on their own at cities where lines meet.
• Don't let a station overflow. A parcel left waiting too long turns overdue and a ring fills around its city — clear it before the ring completes or you lose the level.
• Upgrades unlock as you earn. Money milestones grant more lines, wagons and faster trains. Click a line to upgrade its train.

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