Line Extension
You're the tunnelling machine. Serve stops to grow the line, and cross it only at an interchange.
Stops served
Best
Interchange in
How to build
- Steer by swiping anywhere on the board, or with the arrow keys, WASD or a gamepad. The machine never stops; reversing on the spot is ignored.
- Serve the amber stop by running through it. The line grows by a tile and the next stop appears. The city edge ends the run.
- Interchanges: after every 5th stop, the next stop is an interchange ●●. It stays on the map, and it is the only place the line may cross itself.
- Crossing runs straight through: the machine can't turn on an interchange, and each interchange takes one pass along each way, across and down, no more.
- Pause with P, Escape or Space, or by leaving the page. It gets faster, gently. Your best is kept in this browser only.