Game Dig This online

In the game Dig This you will have to guide balls of various colors into a cave. To do this, you will need to make a tunnel. In front of you on the screen will be visible balls lying on the surface of the earth. At a certain distance underground there will be a cave. With the mouse you will have to draw a line. Your tunnel will run along it. The balls will roll along it in the direction you specify. On the way, you will have to collect gold coins and bypass various kinds of obstacles that are located in the thickness of the earth.