The object of the game is to change the colour of the squares until the entire screen is a single solid colour.

This is done by using the coloured buttons on the bottom of the screen to change the colour of the square in the upper left hand corner to that of those surrounding it.

Changing this square to the colour of those around it, allows it to slowly grow until it fills the entire screen. The ultimate goal is to clear the screen in as few moves as possible.