How to Play:

Tap a square to toggle it. The square and its up, down, left, and right neighbors will switch between on and off.

Your goal is to turn every light off. Black squares are off.

The counter records how many moves you use.

Choose a 3×3, 4×4, or 5×5 board to change the difficulty.

1. The board contains lights that can be on or off.

2. Tap any square to toggle that square and its neighboring squares.

3. Neighboring means directly above, below, left, or right. Diagonals do not count.

4. Keep pressing squares until every light is OFF.

5. Your score is your number of moves. Try to solve the puzzle with fewer moves.

6. 3×3 is Easy, 4×4 is Medium, and 5×5 is Hard.