Pong is one of the earliest arcade video game originally manufactured by Atari in 1972. With an amzingly simple gameplay, Pong was highly successful, and helped to push the video games industry forward. Just hit a ball past the opponent's paddle to win.
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Player 1 Controls:Player 2 Controls:
⇒ W - Move Player 1 Paddle Up ⇒ O - Move Player 2 Paddle Up
⇒ S - Move Player 1 Paddle Down ⇒ L - Move Player 2 Paddle Down

Learn how to create a Pong Game in HTML5
View the full codes (game.js) here
View the accompanying constants file (constants.js) here