From GameBrew - a wiki dedicated to Video Game Homebrew.
A clone of the classic puzzle game from way back, Lights Out.
Turn off all the lights in a grid.
By turning off one light, it turns on all the other lights adjacent to it. (Turning a light on works on the same principle, only backwards.)
Play on a 6x6 grid and you will have a total number of 150 games.
There is no saving or loading for the game, so player will have to start from level 1 every time.