Core gameplay
Blocks only fall into the leftmost and rightmost columns of a ten-column well. Middle columns fill only when blocks slide from the edges after row clears. Your goal is to clear rows using middle columns formed by sliding blocks.

Level and content structure
Fifty stages. Stages 1–20 teach sliding behaviour. Stages 21–50 add speed increases after every five row clears.

Visual and user experience
Edge columns are highlighted with vertical lines. Middle columns appear dimmer until occupied. All transitions occur in discrete steps.

Features
A slide preview shows where edge blocks will move after a row clears. No audio cues.

User value
Requires planning several moves ahead to anticipate sliding outcomes. Suitable for users who enjoy indirect mechanics.

Usage scenario
Evening puzzle time when other distractions are low.