index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="main.css">
    <title>Title</title>
</head>
<body>
    <div class="field">
        <div class="square" id="0"></div>
        <div class="square" id="1"></div>
        <div class="square" id="2"></div>
        <div class="square" id="3"></div>
        <div class="square" id="4"></div>
        <div class="square" id="5"></div>
        <div class="square" id="6"></div>
        <div class="square" id="7"></div>
        <div class="square" id="8"></div>
        <div class="start-game start-game_visible">Начать</div>
    </div>
    <div class="results">
        <div>Лучший результат: <span class="result__best">0</span></div>
        <div>Ваш результат: <span class="result__current">0</span></div>
    </div>
    <script src="memory.js"></script>
</body>
</html>