You are the grey rectangle. The other rectangle that is white, is your opponent also known as Computer or AI. The two long rectangles on the left and right are the border. If the ball touches your border, your opponent gets a point. Same the other way around. The top and bottom borders are just decorations. First the 5 points wins. At the sixth point made, the game will automatically restart. Hope you enjoy! :)
Thanks to SammyCheez on YouTube for the tutorial video How To Make a 1 Player PONG GAME in Scratch 3.0!
