Block Stacker

Overview

The cursor slides back and forth, and your only job is to choose the moment it stops. Block Stacker is a precision arcade game built on a single input: an oscillating block moves horizontally above your growing tower, and a press of space, a click, or a tap drops it straight down onto the highest placed layer. Land it perfectly flush and the next piece is just as wide, but overlap the edge by even a few pixels and the overhang is sliced off — the next block arrives already narrower, and the tower you are building onto has permanently shrunk. Every imprecise drop compounds, so a stack that loses a sliver on layer four loses it again on layer five, and again on layer six, until there is barely a block left to place. The oscillation speed increases as the tower climbs, so the timing window that felt generous at the base closes steadily the higher you go. A persistent high score and a visible tower height turn each run into a measurable thing, and the touch support means the same one-button discipline works on a phone as on a keyboard.

How to Play

One button does everything. On a keyboard, press Space to drop the moving block; on a mouse, click; on touch, tap the screen. The block slides horizontally of its own accord, and your only input is the moment of release — when you trigger the drop, the block falls straight down onto the top of the tower. If it overhangs the layer below, the overlap is trimmed off and the next block spawns at that reduced width. The oscillation speeds up as the tower grows, which tightens the timing window the higher you climb. Play continues until a drop leaves nothing — a fully trimmed block — at which point the run ends and the height of the tower becomes your score.

Tips & Strategy

Aim for the center of the layer below, not the edge. The blocks move fast enough that perfect alignment is rarely the safe play; a centered drop leaves a small overhang on both sides rather than a large one on one side, and symmetric shrinkage keeps the tower playable far longer than lopsided shrinkage. Watch the rhythm of the oscillator rather than the block itself — your brain is good at predicting where a moving thing will be in half a second, and timing the drop to the predicted position beats reacting to where the block currently sits. As the speed climbs, accept small losses rather than gambling on a perfect drop: a sliver trimmed every layer is survivable, but a missed-then-overcompensated drop that loses half the block ends the run on the spot. Treat the tower height display as your real opponent, and when the block gets narrow, slow your own inputs — the temptation is to rush, but the timing window has not actually shrunk, only the consequences of missing it have.