click on Luigi, tap on Luigi or press space to gain clicks. Click/tap on the superangry mushroom or press c to upgrade your clicks. When you upgrade, you get a higher click multiplier for all future clicks, and take away 50000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 clicks. (Ie, 3 upgrades= 3 clicks per 1 press.)
