I just took it as the typical middle class home, except it's a caveman, so everything is all tattered and instead of a bowl of fruit it's a bowl of meat. Not sure if that's correct.

Gary was drunk for this one

This one got me puzzled, so I googled it and the best I could find is

Some are as simple as claiming that the man in the comic is blind, explaining why the newspaper is blank and that he possibly mistook a bowl of meat for a bowl of fruit. Other theories are as deep as thinking that the comic is meant to symbolize the mistreatment and deterioration of the American middle class by the upper crust. Whichever theory is correct is still up in the air, but one thing is for certain is that no one truly knows what this strip is about.

From screenrant