TrainFlow

A 3D voxel puzzle. Wagons lap a loop of track around a landmark, stripping it from outside.

Tap a wagon: it turns blocks of its own colour into sand and rolls away once full. Eaten from the base, the landmark sinks a layer at a time.

Only five trains fit the loop, so the colour order is the puzzle.

EU / California users can opt-out under GDPR / CCPA.

Please respond from the pop-up displayed when starting in the app or within the settings in the app.