Take your drilling robot to the depths of earth to search for the valuable resources. Collect several rubies and diamonds by drilling through the underground walls and tunnels. Use the arrow keys to move around and hit the space bar to start drilling. You can drill in any direction you want. Collect all resources to complete the level. Keep an eye on your fuel meter which will be consumed when you double tap your up key to make a boost jump. The heat meter increases as you keep drilling. As you go deeper the heat keeps increasing. Use your resources to buy upgrades and fuel.