2 Players must erase squares by crossing them with balls from two different sides: vertically or horizontally. Erasing squares activates more dificulties: balls responding to opposite instructions, the squares move around, and a blinking ball. It is a computer version of an optional feature of the Etch-A-Sketch game where a grid with squares was placed on the screen. Player A moves horizontally and Player B vertically. They move a ball in order to cross squares from different sides.