<https://www.html5gamedevs.com/topic/2609-how-to-tween-scale/#comment-17097>
<http://schema.org/text>
"this.add.tween(this.playButton.scale).to({ x: 2, y: 2} .... \n \n"
<https://www.html5gamedevs.com/topic/2609-how-to-tween-scale/>