index.html

<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Puzzle 15</title>
  <link rel="icon" type="image/x-icon" href="img/favicon.ico">
  <link rel="apple-touch-icon-precomposed" href="img/little-penguin-152-27563.png">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css" />
  <link href="https://fonts.googleapis.com/css?family=Indie+Flower|Lobster" rel="stylesheet">
  <link rel="stylesheet" href="styles.css">
</head>

<body>
  <div class="container no-events" id="game-field">

  </div>
  <button class="button" id="start-btn" type="button" name="button">Start</button>
  <script src="app.js" charset="utf-8"></script>
</body>
<footer>
  github 🎲 15 puzzle 🎲 com
</footer>

</html>