Satu is a game of skill and strategy. The aim of the game is to make the play-grid represent a pre-determined combination in the shortest possible time. This is accomplished by clicking on the squares - each square will control the state of one or more of the other squares. The required combinations are shown on the play screen and cycle after every six levels.

Additionally, the affect each square has on the other squares also changes every six levels. For the first six levels, each square will only affect one other square, so achieving the correct combination is quite simply a matter of clicking on each square in turn until each has been changed to the required state. On further levels, however, the effects are more complicated.