• Turn the whole grid dark. Tapping a lamp flips it and its four neighbours.
• Every board is generated to be solvable, and a hint lights the way when you stall.
• Three sizes — 3×3, 4×4 and 5×5 — each a fresh tangle of switches.
• Fully offline. No accounts, no network, no ads.
• Local best-press records that persist.
• Warm lamps that genuinely glow when lit.
Switch every light off.Each tap flips a lamp and its neighbours-mind the ripples