the “what” is interesting on interfaces or when you generate documentation with some tool like sphinx or javadoc.
the “why” is interesting when you are somewhere inside a class or function and do something in a “strange” way, to work around a quirk in the codebase or something like that, or when you employ optimizations that make the code harder to read or atleast less obvious why somethings are done.
https://www.protondb.com/app/2358720
seems like its playable.