Move water between tubes until each bottle contains only one color. You can only pour when the target tube has space and its top color matches the color you are moving, unless the target tube is empty. Use empty tubes as temporary buffers, undo mistakes, and keep your move count low.
Tap one tube to pick it up, then tap another tube to pour.
A single move transfers the full top color segment that fits.
Restart resets the stage. Home keeps your session saved locally.