What it looks like

A signal to start, and a real yard running quietly behind it — two trains, two crossings, missing each other forever.

One train, one gap. Close it and the loop is whole; no arrow, no timer, no reading.

Two trains reached the same rail on the same turn, so both stopped. Nothing is lost — this is the puzzle, not a punishment.

The curly piece takes two turns instead of one. One train is now a turn behind, and the jam is gone.

Two separate loops sharing a crossing. Whether they ever meet depends on how long each lap takes.

Levels sit along a line like stations, changing colour where a new world begins, each showing the stars it earned.

Music and sound effects have separate volumes, the language changes instantly, and unlocking sits behind a parental gate.