<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Shepherd's Dog</title>
    <style>
      body {
        margin: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        background-color: #f0f0f0;
        font-family: sans-serif;
        user-select: none; /* Prevent text selection */
      }

      #game-container {
        position: