From the box: "The referee spins the spinner and then calls out the body part and the color that the arrow points to. For example: the referee may call out "right hand, green." All players, at the same time, must then try to follow the referee's direction."Each player must try to place the called out body part on a vacant hexagon of the called out color. IE. If the referee calls out "right hand, green."Each player must place a right hand on any vacant green hexagon. No more than one hand or foot on any hexagon. Never remove your hand or foot. If you fall you are out of the game.
Sounds a bit like Twister...?