The right retro feel!
The graphics are as simple as it can get, but! it's a retro game so that's ok =)
The music is just perfect for the game. you missed out on the bouncing sounds, adds alot i think.
You seem to have a bit of problem with the collision detection, guessing you are using hitTest? I would recommend trying to learn collision by math instead. it gives you more controll, like being able to have faster ball speeds without it going through the thingys.
Great Pong clone. Nice Work!