Fill Line : one line puzzle game

Fill Line: one line puzzle game asks you to cover every square on a grid with one continuous path. You begin at the designated block and drag through the remaining spaces without crossing your own route or visiting a filled block again.

The minimalist design makes the rule easy to understand, while larger and more complex grids demand stronger spatial reasoning. With no time pressure and many puzzles, it works as a calm logic challenge where planning the route matters more than speed.

Start by selecting the designated block.

Drag your finger across the grid to fill every remaining block.

Create one unbroken line that reaches all squares.

Do not overlap the line or revisit a block that has already been filled.