Are the puzzles free?

Yes, all puzzle levels are completely free — no subscription or download required.

How many levels are there?

The number of levels varies by game. Many puzzle games include 20–100+ levels of increasing difficulty.

Can kids play Only 1 color per line?

Yes, puzzle games are suitable for all ages. The logic-based gameplay makes them great for kids and adults alike.

Some levels are timed, others are relaxed. Check the game's top bar — a clock icon means there's a time limit.

I'm stuck on a level — what should I do?

Most puzzle games include a hint button or a skip option after a few failed attempts. Take a break and return with fresh eyes if the hint doesn't help.

Only 1 color per line

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Only 1 color per line : can you fill in the grid ? The concept is super simple, it a bit like a sudoku game: you must fill the grid but you can only place the same color only once on every line. Are you smart enough to play this color game ? Train your brain with satisfying puzzles that challenge logic, spatial thinking and pattern recognition — all playable for free, directly in your browser.