A free program for Android, by Holy Cow Studio.

Oil Tycoon 2: Idle Clicker Factory Miner Tap Game is an idle clicker game in which you will play the role of an oil miner. You will start with a single oil well and you will have to develop, extract, refine and sell oil.

This game has a simple interface, easy to use, and is very easy to play. The most important thing is that it is completely free.

The game is developed in an open world, in which you can explore and develop your own land. You can construct your own buildings, your own cars and trucks, and even your own airplanes.