Colour the blocks
A one-line puzzle for desktop and phone in portrait mode. You work through a grid of coloured blocks, drawing a single continuous line that covers every one without lifting your finger or mouse. The rules stay simple throughout, and each layout is a fresh test of route planning. It runs straight in the browser, with no installation needed.
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About this game
Sharpen your mind with a connect-the-block-style one-line brain training puzzle game. A simple but addictive one-line puzzle game that’s completely free to play. Your brain becomes more active the more you play. During your commute, before you sleep… enjoy downtime with brain training. The rules are extremely simple. Just fill in all of the blocks using only one line.
How to play
Just fill in all of the blocks using only one line
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