Yes this is obviously a fake app. Pretty much any game that promises money, and says it's made using Unity is. But it's actually not made by unity. Unity is just a site that people can use to make games. That's why they can't be sued. You have to go after the actual game maker. In this case it's Borg Studios. When you go to download a game, look under the title, and it will give you the true scammers. You need to go after them to get anywhere.