click and it changes the alien

src/game.js

@@ -1,22 +1,68 @@
-var game = new Phaser.Game(800, 600, Phaser.AUTO, '');
+var game = new Phaser.Game(800, 500, Phaser.AUTO, '');
+
+var alienData;
 
 game.state.add('play', {
 	preload: function(){
-		game.load.image('pink', 'assets/pink.png');
-		game.load.image('green', 'assets/green.png');
-		game.load.image('grey', 'assets/grey.png');
-		game.load.image('blue', 'assets/blue.png');
-		console.log("preload");
+		game.load.image('alien:pink', 'assets/pink.png');
+		game.load.image('alien:green', 'assets/green.png');
+		game.load.image('alien:grey', 'assets/grey.png');
+		game.load.image('alien:blue', 'assets/blue.png');
+
+		game.load.image('bg:castle', 'assets/bg/castle.png');
+		game.load.image('bg:desert', 'assets/bg/desert.png');
+		game.load.image('bg:forest', 'assets/bg/forest.png');
+		game.load.image('bg:talltrees', 'assets/bg/talltrees.png');
+
+		alienData = [
+			{name: 'Pink', image: 'alien:pink'},
+			{name: 'Green', image: 'alien:green'},
+			{name: 'Grey', image: 'alien:grey'},
+			{name: 'Blue', image: 'alien:blue'}
+		];
+
 	},
 	create: function(){
-		var alienSprite = game.add.sprite(450, 290, 'pink');
-		console.log(alienSprite);
-		alienSprite.anchor.setTo(0.5, 0.5);
+		var state = this;
+ 
+		this.background = this.game.add.group();
+		var bg = state.game.add.tileSprite(0, 0, state.game.world.width,
+            state.game.world.height, 'bg:castle', '', state.background);
+		bg.tileScale.setTo(0.5, 0.5);
+
+		this.aliens = this.game.add.group();
+
+		var alien;
+		alienData.forEach(function(data){
+			alien = state.aliens.create(1000, state.game.world.centerY, data.image);
+			alien.anchor.setTo(0.5);
+
+			alien.details = data;
+
+			alien.inputEnabled = true;
+			alien.events.onInputDown.add(state.onClickAlien, state);
+
+		});
+		this.currentAlien = this.aliens.getRandom();
+		this.currentAlien.position.set(this.game.world.centerX + 100, this.game.world.centerY);
+
+
 	}, 
 	render: function(){
-		game.debug.text('Adventure Awaits!', 250, 40);
+		game.debug.text(
+			this.currentAlien.details.name,
+			this.game.world.centerX - this.currentAlien.width / 2,
+			this.game.world.centerY - this.currentAlien.height / 2);
+
+	},
+	onClickAlien: function(){
+		this.currentAlien.position.set(1000, this.game.world.centerY);
+		this.currentAlien = this.aliens.getRandom();
+		this.currentAlien.position.set(this.game.world.centerX + 100, this.game.world.centerY);
 	}
 
+
+
 });
 
 game.state.start('play');