index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Ball Game 2</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div id="gameboard">
        <div class="score">SCORE: <span id="score">0</span></div>
        <div class="lives">LIVES: <span id="lives">10</span></div>
        <div class="arrowUp"><img src="./img/up-arrow1.png" alt="up"></div>
        <div class="arrowDown"><img src="./img/down-arrow1.png" alt="down"></div>

        <div id="ball1"></div>
        <div id="ball2"></div>
        <div class="walls1"></div>
        <div class="walls2"></div>
        <div id="floor"></div>
    </div>

    <script src="script.js"></script>
</body>
</html>