Etherena is a variation of the game "Simon Says." If you don't follow the lighting instructions of Etherena to the "T" you will lose. That's the objective - last as long as possible. The game will give you a sequence of lights. You have to repeat those lights. This game will test your memory skills. It gets harder and harder as you go along so pay close attention and try not to be distracted while the game is showing you the sequence. This game will keep you playing for hours if you let it, so be careful.