You can access one of the comments in the ending room to enable unshackled growth.
Exactly, I already saw it better mention *unshackled growth allows your max size to increase every time you knockout, or use a silicone tank at 85% fullness or more* then I have to let myself be killed or something like that or something else specific I tried with the machine that enlarges you but it doesn't increase me more than 9500c and more. (By the way, nice game I finished it in less than 1 hour hahaha