A platform slides back and forth above your tower. Click, tap or press Space to drop it. Overhangs are cut off and tumble away.
Land within a few pixels of perfect alignment to trigger a PERFECT: no width is lost and consecutive perfects build a combo.
Every 3 perfect drops in a row adds +10 width back to your platform - the only way to recover from a shrinking tower.
Yes, it is completely free to play in your browser, no download or account needed.
If the moving platform has no overlap with the tower at all, the game ends and your height is scored.
Land three perfect drops in a row - the combo bonus regrows your platform by 10 pixels each time.

Stack Tower is the definitive free browser take on the block-stacking genre that hooked millions of phones. One moving platform glides above your tower; one tap drops it. Whatever hangs over the edge of the floor below gets sliced off and tumbles away, so your tower only gets narrower with every sloppy drop - unless you can master the perfect. Land a block within a few pixels of dead center and the game flashes PERFECT: nothing is lost, a rising-pitch chime rewards your timing, and consecutive perfects build a combo. Chain three perfect drops and your platform actually regrows by 10 pixels, giving skilled players a way to climb back from the brink. Every ten floors is a checkpoint with a minimum-width safety net, the sliding speed climbs steadily the higher you build, and the neon presentation - glowing platforms, particle bursts, camera easing upward as your spire grows - makes every new floor feel earned. It is the purest kind of arcade design: a game you understand in one second, but one where the difference between a good run and a great run is milliseconds of timing. Your best height is saved automatically, so there is always a record to chase, and a single run fits into any coffee-break gap. The controls could not be simpler - click, tap or press Space - and the game runs flawlessly on desktop, tablet and phone with no download and no account. Perfect for fans of Stack, Tetris-adjacent reflex games and one-tap high-score chasers alike. Start stacking, chase the perfect chain, and find out how tall your tower can truly grow before one careless drop brings it to an end.