Click on the coin to get money and buy upgrades with it. When you go to the pet shop there are 3 different pets that you can buy. The Unicorn gives you the option to reset the price of the upgrades. The Griffin gives you a risk or reward button you pay 50 money to have a chance to have anywhere between -5 10 5 cps. And last but not least is the Dragon once you buy this every 5 - 15 minutes a coin appears somewhere on the map and if you click it gives you 100 - 5000 money. but if you don't click it on time it disappears and you have to wait for another one.