Deep underground the underground of the property that you can get from the Play store a total of 6 of the machine are located at the head of the team appointed to save the people. If you want during the recovery process, collect gold, deep under the ground, you can improve your ship you need. In each section, can increase or decrease the number of people in need of rescue. Alive is all that matters. You have to save for the opening of the doors. It is played with the arrow keys and the mouse.