Tower Crane

Tower Crane is a construction-site stacking game drawn as a bright cartoon side view, with a tall yellow crane, a city skyline that sinks away as your tower climbs, drifting clouds and the odd flock of birds. The next piece hangs from the hook on a swinging cable: a steel box, a long girder, an L-shaped module, a slippery glass panel, a heavy water tank or a roof. Move the trolley along the jib, watch the swing and drop it with a tap. Every piece is a real rigid body with its own weight and grip, so it lands, tilts, slides and settles, and a piece that slips off the edge falls onto a cushion of sand with a soft thump.

Forty brain-teasing challenges ask for a height with a given set of pieces and a limited number of drops. Some sit on two pillars with a gap to bridge, some want the tower to stand dead straight, some must be finished with a roof on top, and from level 8 the wind pushes the hanging piece and drifts it as it falls. Three stars go to reaching the height, losing no piece and staying within the drop budget. Undo takes the last drop back exactly as it was, though the drop still counts. Every challenge has been proven with a reference solution under the game's own physics, which is also what the demo plays.

Free build is the place to relax: endless pieces, no budget and no goal, just a quick question of how high you dare to go. Pick any piece from the bar, undo and redo fifty steps, erase a piece and watch the tower settle again, keep up to twenty towers in your browser and press Photo to save a picture. Your tallest stable tower is kept as a high score.