It is simple to play.
It is not occult. No hidden features to unlock or special moves to learn.
Every game is unique. Pong has endless possibilities.
Pong rewards dedicated play: it has a gradient of mastery.
It is an elegant representation. Pong is a depiction of Ping Pong. The similar nature to a physical
representation provides linkages to stored associations to the represented game.
It is social. Pong is a game of interaction and spectatorship.
It has a cool sound. The pong sound made when the square (ball) is hit by the line (paddle) is satisfying. The sound is not unpleasant. It is positive feedback that one has succeeded in positioning the paddle. It signals a brief reprieve while the ball is in their court.
It is fun.