Implement basic save/load (still needs some fixes)

src/index.scss

@@ -12,4 +12,7 @@
   .close-button {
     @apply transition-all w-full h-auto p-4 flex 
   }
+  .mainmenu-btn {
+    @apply transition-all bg-blue-100 hover:bg-blue-200 text-blue-700 text-lg font-semibold p-8  rounded-lg
+  }
 }