Click on the cat in the middle to earn money, and once you have enough money to buy another thing, buy it. At the bottom left corner, there's a thing on the bottom left corner, if you click it, you change the modes. On the click mode, it makes it when you upgrade something once. When it's on As Can when you click on something, it asks you how much times you want to upgrade.
Thanks to Old Town Road Clicker for giving me the idea of making a clicker game. Check out my new studio, please. https://scratch.mit.edu/studios/27392660/ It is a contest studio, with a new theme next week, and there are prizes.