The object of the game is simple. Turn all of the squares on the grid to black. Clicking on a square will turn it and its neighbors into another color (black to white, white to black). The first fifteen levels are on a 3x3 grid, the next ten are on a 4x4 grid, and the final five are on a 5x5 grid, creating thirty challenging levels. Can you get through them all? Press r to reset the grid.