Rockford is a digger who searches for gems and diamonds in the dark caves. He seeks for every precious stone and don't afraid dangerous creatures or other obstacles.
Within a limited amount of time try to find all required diamonds and gems avoiding obstacles and dead ends. Plan your way to each diamond and make sure you won't get smashed by the boulder after you dig a tunnel under it. Collect as many precious stones as you can but find the exit before time runs up. See how many points you can get playing this game.