Processing Style Test - Swift

AppDelegate.swift

import Cocoa
import SpriteKit

class AppDelegate: NSObject, NSApplicationDelegate {
    
    @IBOutlet var window: NSWindow
    @IBOutlet var skView: SKView
    
    func applicationDidFinishLaunching(aNotification: NSNotification?) {
        let scene = GameScene(size:self.skView.bounds.size)
        scene.scaleMode = .AspectFill
        
        self.skView!.presentScene(scene)
    }
    func applicationShouldTerminateAfterLastWindowClosed(sender: NSApplication) -> Bool {
        return true;
    }
}

GameScene.swift

//Source : http://www.gamefromscratch.com/post/2014/06/13/Game-development-tutorial-Swift-and-SpriteKit-Part-2-Using-Sprites-and-by-default-SKNodes.aspx

import SpriteKit

class GameScene: SKScene {
    
    var shipSpeed = CGFloat()
    let sprite = SKSpriteNode(imageNamed: "sprite1")
    
    override func didMoveToView(view: SKView) {
        
        let backGroundSprite = SKSpriteNode(imageNamed: "background")
        backGroundSprite.position = CGPoint(x:0,y:0)
        backGroundSprite.anchorPoint = CGPoint(x:0.0,y:0.0)
        backGroundSprite.size = view.bounds.size
        self.addChild(backGroundSprite)
        
        sprite.anchorPoint = CGPoint(x:0.5,y:0.5)
        sprite.position.x = 100;
        sprite.position.y = 100;
        sprite.xScale = 1
        sprite.yScale = 1
        self.addChild(sprite)
        
        
        var shapeArr : Array<SKNode> = []
        for index in 0...5 {
            var shapeE = RectE().simpleView(CGFloat(index)*100)
            shapeArr.append(shapeE)
            self.addChild(shapeArr[index])
        }
        
    }
    
    override func update(currentTime: NSTimeInterval) {
        
        if ((sprite.position.x>0)&&(sprite.position.x < view.bounds.width)) {
            shipSpeed = 5
        } else {
            shipSpeed = 0
            sprite.position.x = 0
        }
        
        sprite.position.x += shipSpeed
        
    }
    
    override func mouseDown(theEvent: NSEvent!) {
        self.sprite.position = CGPoint(x:theEvent.locationInWindow.x,y:theEvent.locationInWindow.y)
    }
    
}


class RectE: SKScene  {
    
    let shapeEle = SKSpriteNode()
    
    func simpleView(_x: CGFloat) -> SKNode {
        shapeEle.color = SKColor.redColor()
        shapeEle.position = CGPointMake(_x, 400)
        shapeEle.size = CGSizeMake(50, 50)
        return shapeEle
    }
    
}