How to play Lights Out
Tap any square to flip it and the squares directly above, below, left, and right. Diagonal neighbors do not change. The goal is to switch every light off.
Each new board starts from a solved grid and applies a sequence of random moves, so every puzzle can be solved. Use Undo to reverse your last tap or Show Hint to reveal one move that will help.
Game selection inspired by mashukui's Web Games collection, released under the MIT License.