Add Java Features to a game

Hello, Attached is my game and i need someone to add a few features, I need this asap! I have made a game in java which is basically ping pong, I need someone to: - Add sound to the game - Add difficulties (easy, medium, hard) - Add a score counter ( high score table if possible) Then basically need someone to clean up , and comment on the code they have put describing what it does. Unfortunately because of my financial state I will mostly be considering lower bids. Thanks It doesnt have to be perfect and can be abit glitchy, I would also appreciate it if you could comment on the lines saying what bit of code you put does what