Vial Voyage

Vial Voyage is a liquid-sorting puzzle. Tap a vial, then tap another, and the colour on top pours across — every layer of that colour at once, as long as there is room and the colour below matches or the vial is empty. When every vial holds a single colour, the level is done.

There are three hundred levels in six chapters — the Garden, the Dunes, the Glacier, the Volcano, the Nebula and the Magic City — and every one is checked to have a solution before it is shown. New pieces arrive as you go: frozen vials that thaw when others are finished, hidden colours that appear as you pour, small vials that hold only three, locked vials that open with a key colour, glass orbs you break by pouring their colour on them, and linked vials that only seal together.

Each level has a par, and finishing under it is worth more. The difficulty adjusts itself a little to how you play the new levels, and there is a daily challenge with a move limit and a clock that is the same puzzle for everyone that day, plus an endless Zen mode with no limits at all.

Hints, an extra vial, undo and a tool that breaks ice or a lock help when you are stuck. Coins buy them, and eight vial skins. Every colour can carry a symbol for colour-blind play, the whole game can be played with a keyboard, and it is available in eight languages. Progress stays in your browser.