Lights Out #18

How to play Lights Out

• Tapping a cell flips it and the cells directly above, below, left and right.
• Switch every light off to win.
• Tapping the same cell twice undoes it, so order doesn’t matter.
• Tip: clear the top row by tapping the cells right below its lit lights, then work your way down.
• Stuck? Use up to 3 hints (+10s each).

You get one attempt — the timer starts when you press Start and keeps running if you leave, even while this is open.