Imagine that you decided to make some money – or maybe even quite a lot of them! – looking for oil. You’ll need a special machine to drill the ground. But don’t think that you’ll just press the button and wait for the result. No, you have to carefully operate your equipment tracking the oil meter and making sure you don’t break it on the stones. That will allow you to go deeper and deeper increasing your income. You will discover gold and maybe even a bunch of diamonds! Each level will grow harder than the previous, so don’t relax!