From the first page of the PDF:
This is a game about relationships and their inherent instability due to forces beyond our control. Also rocks.
In this game one player takes on the role of the Elemental Forces (EF). The other players take the roles of rocks pondering the meaning of their existence with each other and their environment, as their lives are determined by the whims of the Elemental Forces.
This game is for 4 to 10 players. It requires space for play and around 2 hours.