We mostly find a mole underground because that is what they do. They dig up underground and they live there. As we have evolve, so are they and now they join the work force as train operator. Their job is get and deliver those materials to constructions sites. And since lots of materials get lost in the cave, Mole also makes more money from selling those lost materials before that he found. Truly, this a job fit for a mole and that is why, he gets hired for it. This game is a fantasy game and should not be treated seriously. The objective of the game is to get the materials to the finish line. You earn money once you do that. You can make more money if you were able to get the hidden materials in the cave and deliver it to the manufacturer. Drive as fast as you can once you have been given the go signal. This game has a timer and you should be concerned with it. There is a minimum material that you need to deliver if you want to pass a level. Try to make all the necessary precautions to avoid getting struck to the head by anything hard.