Playing Glowdrop Lab

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Keep an empty glass free as long as you can: it is the only place any color can go.

Tap or click a glass with liquid, then the glass you want to pour into. You can only pour into an empty glass or onto the same color, and every matching layer on top moves at once if there is room. Each glass holds 4 layers. A puzzle is solved when every glass is either empty or full of one color. Each pour counts as one move. There is no timer and no way to lose: if no pours are left, use Undo or Restart. Puzzles start with 2 colors and add one every five levels from level 6, up to 7 colors in 9 glasses from level 26.

Tap two glassesPick a glass, then pourClick two glassesPick a glass, then pour1 – 9Pick a glass by its numberU / Backspace / Undo buttonUndo the last pourH / Hint buttonShow a hintR / Restart buttonRestart the puzzleEsc / tap it againDrop the selected glassL / list buttonOpen the level list