New Twiddle

application.controller.js

import Ember from 'ember';
import credits from 'demo-app/credits/mixin';
export default Ember.Controller.extend(credits,{
  appName:'Ember Twiddle',
init() {
this._super(...arguments);
let t = this.get('myService.display');
console.log(t);
}
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

credits.mixin.js

import Ember from 'ember';

export default Ember.Mixin.create({
	myService: Em.inject.service()
});

my-service.service.js

import Ember from 'ember';

export default Ember.Service.extend({
	display: false
});

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}