game.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">        
  <title>Game</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
  <canvas tabindex="1" width="640" height="480"></canvas>

  <script src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
  <script src="game.js"></script>
  <script src="entity.js"></script>
  <script src="ball.js"></script>
  <script src="paddles.js"></script>
  <script src="pong.js"></script>
</body>
</html>