How to Play Stack Tower
An amber platform slides above the top of your tower. Press Space or Enter, click the game, or tap the screen to drop it straight down. The part that overlaps the floor below becomes the next level, so release only when the moving block is lined up over the existing stack.
Every imperfect placement trims away the overhanging section. That narrower surface then becomes the target for the following floor, making small timing errors accumulate into a much harder challenge. Land within a few pixels of a perfect match and the block snaps cleanly into place without shrinking your tower.
Missing the tower completely costs one life, but the stack remains standing and you can attempt that floor again. You have three lives for the entire build. Each successful floor adds one point, and the platform moves faster as your score climbs, so a tall tower demands both patience and quick visual judgment.
Track one edge of the moving platform against the edge below instead of trying to judge the whole shape at once. When the tower becomes very narrow, anticipate the center crossing and tap slightly earlier to account for the rising speed. A steady cadence is useful, but always adjust when the platform reverses direction or your target shifts after a trim.