How to Play
1. Tap any lantern. It flips lit or unlit, and its up, down, left and right neighbours flip too.
2. Corners flip 3 lanterns, edges flip 4, middle lanterns flip 5. Plan around the overlap.
3. Light every lantern on the grid to win. There is no timer.
4. Stuck? Undo is free, and a Hint highlights one winning move for 10 flames.
Keyboard: arrow keys move, Enter or Space taps, U undoes, H hints, R restarts.