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Three ways to play: climb the Levels, chase a high score in Score Rush, or just relax in Zen mode. Every board is generated solvable.
Levels is the endless ranked progression from three colors up to twelve, with undo and an extra flask. Score Rush is the leaderboard mode: boards keep coming, +30 per completed flask and +150 per board, but no undo and no extra flask - one mistake chain and the run is over. Zen lets you pick how many flasks you want and simply sort forever; a fresh puzzle pours in each time you finish.
Water Sort Puzzle is a color sorting game: each tube holds four units of colored water, and you pour the top color onto a matching color or into an empty tube until every tube is a single color. This page answers searches for water sort puzzle online, color sort game and liquid sort puzzle with a free, no-download browser version.
Tap or click a tube to lift it, then tap another tube to pour. You can only pour onto the same color or into an empty tube, and only as much as fits. Use Undo freely, restart the same deal, or add one extra tube per level when you have painted yourself into a corner.
Each board is generated from a fixed seed and verified by a solver before you ever see it, so there is always at least one path to a full sort. If you are stuck, the problem is the order of pours - undo a few steps and try a different sequence.
Open with pours that expose long runs of one color, keep one empty tube free as a workbench, and avoid burying rare colors under mixed stacks. Counting the four units of each color tells you which tube can be completed soonest.
Tubes are sized for phones and desktops, pour animations stay short, and the fullscreen button removes every distraction. Your level, solved count and fewest-moves records are saved in your browser.
Levels start with three colors and climb to twelve colors in fourteen tubes. The LEVEL card has arrows, so you can replay any level you have already reached and beat your own move record.