add stats-param

src/components/stats-param.js

@@ -0,0 +1,7 @@
+AFRAME.registerComponent('stats-param', {
+  init: function () {
+    if (AFRAME.utils.getUrlParameter('stats') === 'true') {
+      this.el.setAttribute('stats', '');
+    }
+  }
+});

src/index.html

@@ -52,6 +52,7 @@
       play-sound__crescendo="sound: #crescendo; event: victory; volume: 0.75"
       search
       stage-colors="color: blue"
+      stats-param
       vr-mode-ui="enterVRButton: #vrButton"
       tutorial-2d>
       <!-- fog="color: #a00; density: 0.035; type: exponential" -->