The oilman app is an app that makes you find oil by digging it up underground. The deeper you get, the more oil you will find. This game will give you one tool which is a pickaxe and each level, you have the option to upgrade it so you can get more oil with the help of it.

On the first level, you will be on island 1 and once you have got all the oil in this island, you can transfer to the other. Make sure to get enough oil so you can level up. There are also gems in the island which you can collect.