W & S keys for the panel on the left and Up & Down arrow keys for the panel on the right. The ball will bounce around and try to stop it from bouncing on the line behind your panel (red for the panel on the left and blue for the panel on the right).
If you have any comments, questions or concerns feel free to pot them in the comments. Credit goes to CMH100 for scripts and some sprites and backgrounds. I edited most of his/her scripts and sprites. This is just the first edition. I will add more rules and make another Ping Pong game. Enjoy!