Update index.html

Author: LamaGamesHTML

zombiesurvival/index.html

@@ -3,6 +3,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Zombie Survival</title>
+    <link rel="stylesheet" href="styles.css">
     <style>
         body {
             margin: 0;