Tilorswift levels will be loaded asynchronously now

js/FileLoader.js

@@ -4,7 +4,8 @@ export default class FileLoader
     {
         this.filename = filename;
         this.content = '';
-        this.loadContent();
+
+        this.onLoad = () => {};
     }
 
     getContent()
@@ -19,10 +20,11 @@ export default class FileLoader
         request.onreadystatechange = () => {
             if (request.status === 200 && request.readyState === 4) {
                 this.content = request.responseText;
+                this.onLoad(this.content);
             }
         };
 
         request.open('GET', this.filename, false);
         request.send();
     }
-}
+}