Free Water Sort — Liquid Colour Puzzles

Water Flow Sort is ArcadeOwl's collection of liquid colour-sorting puzzles — the famously relaxing brain teaser where layered liquids must be poured between glass tubes until every colour sits alone. The rule is tiny (pour only onto the same colour or an empty tube) but the planning runs deep: every pour uncovers something new, and empty space is the most precious resource on the board. We have 120 levels across four tiers, from a gentle five-colour splash to fiendish eleven-colour storms, in two dozen liquid themes. Every level is verified by a solver using exactly the rules you play with, so a clean solution always exists, with a fair pour target for three stars. Free, instant, one-finger play with undo and global plus daily leaderboards.