Water Color Sort

Water Color Sort only lets water pour between tubes when the colors match or a tube is empty, which turns a seemingly simple sorting task into a genuine planning puzzle, one careless pour can trap a color underneath another it can't be separated from later.

Because pours are irreversible, working out a full sequence of moves mentally before touching anything tends to avoid the dead-end states that force a level restart. Keeping at least one tube empty for as long as possible gives more flexibility to shuffle colors around, while filling every tube early often locks a puzzle into an unsolvable arrangement. Tiny Pack tests a similar spatial planning instinct through packing shapes into a limited grid instead of sorting liquid colors.