Allow to start both on cordova and web

src/main.js

@@ -1,15 +1,19 @@
 let game, context;
 
-document.addEventListener("deviceready", () => {
+if (window.cordova) {
+    document.addEventListener("deviceready", start, false);
+} else {
+    start();
+}
 
+function start() {
     if (typeof StatusBar !== 'undefined') {
         StatusBar.hide();
     }
 
     init();
     loop();
-
-}, false);
+}
 
 function init() {