Just a bit of absurdism. Modern-day leftists often fight over the legacy of Marx, who was hugely influential; the joke here is that "IF MARX WAS HERE TODAY HE'D-" and instead of "be 'x' ideology" it's "Enjoy a well-regarded classic game"
it's a reference to a (possibly apocryphal? i'm not very well educated) anecdote about sigmund freud. freud had a hypothesis that basically any phallic object in a dream represents an actual phallus because supposedly basically everything in the human psyche is connected to sex. someone pointed out his fondness of cigars and he replied with the quote, "sometimes a cigar is just a cigar."