Fill Line: Cover Every Cell

About Fill Line: Cover Every Cell

Fill Line: Cover Every Cell challenges you to create a continuous path that fills every square on the grid without retracing your steps or moving diagonally. Beginning from a designated starting point, you carefully trace the line through adjacent cells, navigating increasing complexity as levels progress. The puzzle introduces unique elements such as blocks that require crossing twice, directional arrows, and bridges where the path overlaps. With a calm and methodical pace, the game offers hundreds of levels spread across chapters that gradually raise in difficulty, combining moments of simpler puzzles with more intricate ones. This logic-based puzzle game encourages thoughtful planning, with no time pressure or penalties, making it a relaxing yet engaging experience for fans of brain teasers and connect-the-dot challenges.

How to Play

Start from the marked cell: it is already filled and pulses. Without lifting your finger or the mouse button, draw the line through neighboring cells up, down, left or right. The goal is to fill every block on the board with a single line.

Made a mistake? Drag the line back to undo steps, or tap any cell of the line to continue from there. The Undo button removes the last step, and Restart begins the level again. If you get stuck, tap Hint and the game will show the next steps.

Special cells: a block with a ring must be crossed twice; a bridge is crossed once vertically and once horizontally, and you can't turn on it; an arrow can only be passed in its direction.

On a computer: arrows or WASD — step, Z or Backspace — undo, R — restart, H — hint, Esc — pause.