Core gameplay
Each falling block occupies a single cell. Blocks fall one by one. Your task is to direct each block to a column so that rows become completely filled. Each filled row disappears instantly.

Level and content structure
Fifty stages. Stages 1–10 introduce basic column strategy. Stages 11–30 add sporadic block colours. Stages 31–50 require clearing specific rows before new blocks appear.

Visual and user experience
High-contrast mode with black blocks on a light beige board. Edge highlighting shows which rows are nearest to completion. The interface uses large click buttons for rotation.

Features
A row counter shows rows cleared in the current stage. No timer or move limit applies.

User value
The single-cell block rule changes traditional row-clearing logic. May assist focus training by encouraging column-by-column attention.

Usage scenario
Short desktop sessions between household tasks.