Lights Out Casual app for iPhone and iPad
LightsOut is a puzzle where you are given a grid of cells, or lights, with some dark and others light. You must turn them all off by clicking on the cells. Each click toggles that cell and each of its immediate neighbors. All valid LightsOut puzzles can be solved without clicking on any cell twice. This is because clicking on a cell twice is the same as not clicking it at all. The easiest way to solve LightsOut puzzles is to use a method called Chase The Lights.
Hope this puzzle could bring you some interest on Matrix Mathematics.
Note: You could swipe to restart the puzzle!