Implement native opening scenes, battle foundation and overworld movement

index.html

@@ -6,7 +6,7 @@
       name="viewport"
       content="width=device-width, initial-scale=1, viewport-fit=cover"
     />
-    <meta name="theme-color" content="#102b2a" />
+    <meta name="theme-color" content="#f8f4df" />
     <meta
       name="description"
       content="A native web port of Pokémon Crystal, using assets from your own ROM. First exploration milestone."