Fixed the tech demo missing a setup function

stories/demo.js

@@ -2,7 +2,10 @@ stories.push({
   "id": "demo",
   "name": "Tech Demo",
   "intro": {
-    "start": "Home"
+    "start": "Home",
+    "setup": state => {
+
+    }
   },
   "sounds": [
     "sfx/oof.ogg"