http://stackoverflow.com/questions/39938176/ember2-8-sending-an-action-from-a-component-to-the-controller

components.game-card.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['flip-container']
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  gameCards: null,
  
  init() {
    this.set('gameCards', [0]);
  },
  
  actions: {
    proveImAlive(cardNo) {
      this.get('gameCards').pushObject(cardNo);
      console.log('Im aliiiiveeee - cardNo', cardNo);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{game-card proveImAlive=(action 'proveImAlive')}}
<br>
{{#each gameCards as |game|}}
  {{game}},
{{/each}}

templates.components.game-card.hbs

<div class="flipper">
  <div class="front"></div>
  <div class="back">
    <button {{action proveImAlive 1}}> ProveIamAlive</button>
  </div>
</div>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}