"Make cats click. The growth of cat bubbles accelerates when you start purchasing upgrades that increase the number of cat bubbles in production. Eventually, you will generate billions of cat bubbles with each click, sending the world of cats into an endless spiral of cuteness. You can use the reset button to start over and receive a permanent benefit in your next game if you feel the need for a fresh start."
Use the mouse or touch screen to click on the cat. Go to the store and purchase upgrades to make even more bubbles.