index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link
      rel="icon"
      href="https://www.nicepng.com/png/full/151-1515710_flappy-bird-png-flappy-bird-icon-png.png"
    />
    <link rel="preconnect" href="https://fonts.gstatic.com" />
    <link
      href="https://fonts.googleapis.com/css2?family=VT323&display=swap"
      rel="stylesheet"
    />

    <title>Flappy Bird JS</title>
  </head>
  <body>
    <canvas id="game-canvas" width="320" height="480"></canvas>
    <style>
      body {
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        overflow: hidden;
      }
      canvas {
        border: 1px solid #000;
        display: block;
        margin: 0 auto;
      }
    </style>

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