Liquid Sorting

Liquid Sorting takes the everyday idea of separating things and applies it to liquids that will not blend. Each level starts with flasks filled in coloured layers, and the unusual property of this liquid is that the layers stay distinct — so you can transfer some of the top layer of one flask into another and it sits where you put it. Getting every flask down to a single colour is the goal, and the difficulty comes entirely from flask capacity and pour order. A pour that looks obviously right can leave you with no legal move at all a few steps later, which is what turns a simple mechanic into a puzzle worth thinking about.