endgame.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Game over!</title>
    <link rel="stylesheet" href="app.css">
    <link rel="shortcut icon" href="https://cdn.pixabay.com/photo/2017/11/15/21/01/anatomy-2952567_960_720.png">
</head>
<body>
    <div class="container">
        <div id="end" class="flex-center flex-column">
            <h1 id="finalScore"></h1>
            <form>
                <input type="text" 
                name="username" 
                id="username" 
                placeholder="Enter your name"
                />
                <button type="submit" 
                class="btn" 
                id="saveScoreBtn" 
                onclick="saveHighScore(event)"
                >
                Save
                </button>
            </form>
            <a href="game.html" class="btn">Play Again</a>
            <a href="index.html" class="btn">Go Home</a>
        </div>
    </div>
    <script src="endgame.js"></script>
</body>
</html>