The document discusses three existing side-scrolling games: Scott Pilgrim vs the World, Castle Crashers, and the original Street Fighter. Scott Pilgrim relies on mundane environments with bizarre events to appeal to teens and younger audiences. Castle Crashers has a simple premise but bizarre situations like surfing on a catfish-bear hybrid to appeal to audiences aged 7-18. The original Street Fighter had minimal storyline and focused on combat between weird buff characters representing their homelands. The research indicates these games commonly use cartoony aesthetics and loose plots to prioritize fun with friends over serious narratives. The analysis suggests incorporating more humor and a less dark/gritty tone for the new work.