Core gameplay
Standard falling blocks with row clearing. Progress is measured by distance (rows cleared). Every one hundred rows, the well width reduces by one column until reaching six columns.

Level and content structure
No fixed levels. Continuous progression from ten columns down to six columns. Once six columns are reached, speed increases every fifty rows.

Visual and user experience
Column width changes are shown with animated side walls moving inward. The transition takes two seconds and pauses the game.

Features
A column width indicator shows current width and next width target. No score comparison with other users.

User value
Long-term progression without level resets. Suitable for users who prefer gradual difficulty increases over many sessions.

Usage scenario
Extended travel such as long train rides.