Pipe Connect 3D

Yes. It runs in the browser on phones, tablets and computers, in portrait or landscape. On a phone you tap a pipe to turn it and press and hold to turn it back. The board resizes to fit your screen, and on a tall Tower level you drag it to look along the climb.

Turn each pipe until its openings line up with its neighbours, forming one sealed route from the tap to every drain. Start from the tap and the drain, whose openings never move, then work along the route. Any open end the liquid reaches will leak, so close spare branches.

Tower levels are boards much taller than your screen. The source sits on the bottom row and the drain on the top row, so the route climbs a long way. Drag or scroll the board to look along it. Once the liquid runs, the camera climbs with it, and a bar on the right shows how far it has got.

Lava is slow: in Flow and Missions it waits three seconds at an open end, then hardens, so you can still turn the next pipe. Gas rises and only goes down through a pump, and a gas leak spreads after two seconds. Dirty water and acid must pass a filter before the clean tank takes them.