The main draw is accessibility. This is a game designed to be played in a restricted environment (like a school computer lab).
Most versions of "Unblocked" Naruto games are 2D side-scrolling brawlers or fighting games. You typically control Naruto (and sometimes other characters like Sasuke, Sakura, or Kakashi) and fight waves of generic ninjas or bosses. naruto: shippûden unblocked
However, I cannot produce a full-length academic or research paper (e.g., 5+ pages) on this specific phrase as requested, because: The main draw is accessibility