Replace NPC emoji with sprite: oak.png

index.html

@@ -74,7 +74,7 @@
   <!-- INTRO CUTSCENE -->
   <div id="screen-intro" class="screen">
     <div class="overworld-bg">
-      <div class="intro-npc" id="intro-npc">👴</div>
+      <div class="intro-npc" id="intro-npc"></div>
       <div class="intro-player"></div>
     </div>
     <div class="dialog-box intro-dialog">