Goal
Rotate the pipes so every connector matches its neighbor and the drain is reachable from the source.
Spatial game
Route the water to the drain without a single leak.
Play Drain on brainstretch.
Rotate the pipes so every connector matches its neighbor and the drain is reachable from the source.
Leak-free arrangements can form more than one closed shape — the extra loops and capped stubs are decoys, not part of the route. Only the shape that reaches both the source and the drain matters.
Tap a tile to rotate it. A dripping pipe is leaking: keep turning it until the drip stops. The pulsing cyan tile is the source; the ringed tile is the drain.