Click the cat. Buy Upgrades in the shop. Click the cat again. Keep clicking the cat until your fingers bleed. Then click some more. Prestige resets progress, but doubles efficiency of clicks and autoclicks. Autoclicker turns your mouse into an autoclicker
Thanks to Chubbydoggie123 for the original project Scratch The Cat (Clicker v1.0) Warning: The number abbreviator BREAKS after Novemdecillion (10^60)