Signal Box

How to play

• Trains come in at the two portals at the top and run down the diagram. Each train is the colour of its platform and carries the platform's letter, so colour is never the only clue.
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• Points are the numbered levers. Each has two settings, shown by which branch is lit. Throw them to steer. A set of points with a train on it is locked, and shows red.
• Signals hold trains at their portal on red and let them go on green. A train kept waiting more than 8 seconds is a strike, so holding only buys time. A held train comes out the moment you release it, so don't release both portals into the merge together.
• Score: a train at its own platform is a point. A train at the wrong platform, or one that isn't in service yet, is a misroute and a strike. Three strikes end the run. Two trains meeting end it at once.
• Platforms: three are in service at the start; more open as you deliver trains (a fourth at 10, a fifth at 25). Trains and the timetable get faster and denser the longer you last.
• Keys: 1 to 4 throw the points, Q and W work the signals, Space or S toggles both, P or Esc pauses. Touch: tap a lever or a signal. Gamepad: d-pad moves the cursor, A throws or toggles, B works the nearest signal, Start pauses.
• Pause also happens when you leave the page. Your best is kept on this device only.