index.html

<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <title>Simon</title>
  <link rel="stylesheet" href="styles.css">
  <link href="https://fonts.googleapis.com/css?family=Press+Start+2P" rel="stylesheet">
</head>

<body>

<h5 id="level-title">level - 1</h5>
<div class="clear">
</div>
<h1 id="title">Press space to Start</h1>
  
  <a href="start.html"><img class="back" src="btn-back.png" /></a>

  
  
  <div class="container">
  
       <div class="btn green"   type="button" id="green" /></div>
   
  <div class="btn red"   type="button" id="red" /></div>

 <img class="logo" src="logo.png"/>

   
  <div class="btn yellow"  type="button" id="yellow" /></div>
      
     
        <div class="btn blue"  type="button" id="blue" /></div>
     


  </div>
  <br>
  <br>
  <br>
  <footer id="footer-text">
  <div class="footer">
  <img  class="footer" src="simon.png" alt="footer" />
  </div>
  </footer>

<script src="jquery-3.4.1.min.js"></script>
<script src="game.js" charset ="utf-8"> </script>
</body>

</html>