Stackfall

Stackfall is a one-tap 3D stack game about timing and nerve. A square slab slides over the top of your tower, first along one side and then along the other, and a single tap drops it. Whatever hangs over the edge of the floor below is sliced off and tumbles away, so every sloppy drop leaves you a smaller slab to work with. Line it up perfectly and it snaps into place with a bright white flash and a piano note that climbs higher with every perfect drop in a row.

The tower rises over a painted city at sunset. As you climb, the camera follows you past the clouds, the sky turns from orange to dusk and then to a starry night, and skyscrapers stand beside your tower with a numbered flag on every roof. Every tenth floor is a golden slab that tops one of those rooftops: land it and you win a big bonus, land it perfectly and your tower grows back. Between the rooftops the city throws something new at you. On gust floors the wind pushes the slab, so it races one way and drifts slowly back the other, and the smart drop is on the slow pass. On rush floors the slabs come in faster but every floor is worth half as much again.

It is easy to start. Taps before the slab has reached your tower are simply ignored, so an eager first tap never ends a run, and the first slabs move slowly with a generous perfect window and an outline that lights up when a drop would be perfect. The challenge comes later: the slabs speed up every four floors, the perfect window narrows, and a tower that has been shaved down to a sliver leaves almost no margin. From the third perfect drop in a row every perfect grows your slab back, so a good streak is your lifeline.

A round lasts at most one minute, which makes Stackfall one of the quick games you can fit into any break. Floors are worth 100 points (150 on rush floors, 200 for a golden slab), perfect drops add more the longer your streak, and every rooftop you pass adds 500, so a tall tower built from clean drops beats a tall, ragged one. Free play gives you unlimited rounds; when you are ready, press Ranked attempt to put one run on the all-time and weekly leaderboards. Every top score is replayed on our servers before it is shown, so the board only lists real towers.

Stackfall works the same with a mouse, a keyboard or a touchscreen: click or tap anywhere, or press Space, Enter or the down arrow. It is a natural fit if you enjoy one-button games and timing games, and it shares the calm, focused rhythm of our other skill games. In Swipe mode it also opens the Warm-up and Marathon gauntlets, where your tower is only the first test of the run.