Stack

Spatial precision · scored in floors

Free to play, no signup. Pure skill: every stage is a deterministic function of its published seed and your own inputs.

How to play Stack

A block slides above your tower. Tap to drop it. Whatever hangs over the edge is sliced off for good, so every sloppy floor makes the next one narrower. Floors score; overhang lost breaks ties.

How Stack is scored

Stack is scored in floors, and a higher number is a better run.

Clear the GOAL — the line drawn from that stage's own seed — and your run takes its place on Stack's ladder and in the one live world ranking.

Stages and attempts on Stack

Everyone in the world plays the same sealed stage of Stack. A new stage opens every 90 minutes, and each one gives you 3 ranked attempts.

Every player who opens Stack inside that window plays exactly that stage, so one score on it is comparable with every other.