Play Fill Line : one line puzzle game Online Free

About This Game

Cover the entire grid with one unbroken stroke and nothing more. That is the whole rule of this minimalist brain teaser, and it is exactly what makes it so devious. Drag from the starting block and fill every remaining square in a single continuous line, without doubling back over any space you have already touched. Boards begin tiny and friendly, then grow into wide, twisting layouts that demand real spatial reasoning. With no timer ticking and no penalty for a wrong move, it is a peaceful, absorbing workout for puzzle lovers.

How to Play

Press on the marked starting block and drag across the board to draw your line, filling every empty square as you go. You cannot cross a filled square twice, so plan the whole route before moving. Fill the final square to clear the level. Tip: dead ends usually start at corner squares, so decide early how each corner will be entered and left.