function preload ()
{
this.load.image('atari', 'assets/sprites/atari130xe.png');
}
function create ()
{
// setScale sets the x and y scale values (1 = no scale)
this.add.image(100, 300, 'atari').setScale(1, 0.5);
this.add.image(400, 300, 'atari').setScale(1, 2);
var image2 = this.add.image(700, 300, 'atari');
// You can also set the scale via the scaleY property:
image2.scaleY = 4.5;
}