I guess this is a minimal "cookie clicker-like" on the terminal.
I'm not sure there's much to it other than [mod], [mod], [mod], [new subject], [mod], [mod], [mod], [new subject], [upgrade home], ...
I bet it was interesting for learning purposes, but there's not much reason for writing it in pure C.
The ascii art looks great. I ran it on https://github.com/Swordfish90/cool-retro-term :)