index.html

<!DOCTYPE html>

<html>

    <head>

        <meta charset="UTF-8">
        <meta name="viewport" 
            content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <link rel="stylesheet" href="style.css">

        <title>Minesweeper</title>

        <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
        <script src="app.js"></script>

    </head>


    <body>

        <div class="container">

            <div class="game-title">Minesweeper</div>

            <div class="top-details">

                <div class="game-text"> </div>

                <div class="details">
                    <select class="difficulty-level">
                        <option value=0>Easy</option>
                        <option value=1>Medium</option>
                        <option value=2>Hard</option>
                    </select>
                    <button class="reset-btn">Reset</button>
                </div>

            </div>

            <div class="game-grid"></div>
            
        </div>

    </body>


</html>