Tap two tubes to pour
Tap two tubes to pour
Pour liquids between tubes until each tube holds one color.
Each tube holds up to 4 colored layers. Two tubes start empty.
Tap a tube to pick it up, then tap another tube to pour. Liquid only pours when the top color matches (or the target is empty).
When every tube is empty or holds a single color, the level is cleared and the next, harder level begins.
Goal: clear as many levels as you can.
The two empty tubes are your whole toolkit, so treat them as precious workspace rather than dumping grounds. Before any pour, check that the colour you free up actually has somewhere useful to go; pouring just because two tops match often buries a colour you needed and leaves you with no legal moves later. Always look one or two pours ahead, the way you would in a sliding puzzle.
The real skill is consolidation: aim to gather all four of one colour into a single tube before starting the next, instead of spreading the same colour thinly across several tubes. A colour stranded at the bottom under three different layers is the classic trap, so prioritise freeing those buried bottoms early. When a level stalls, it is almost always because an empty tube got filled with a mix that can no longer be separated.