You are provided with a grid of squares. Some of them are colored. Your goal is to remove all of those colored squares from the grid, to replace them with blank ones. You can tap each square. With your click up to 5 squares will change their color to the opposite. All of the grids are generated automaticly by a computer by placing moves on a blank grid. Options menu allow you to change the size of a grid from 3x3 to 7x7. Also in the options menu you can find a difficulty setting which defines how much moves computer makes to prepare a grid for you. It's a beta version of a game. A part of its content could be added soon.