iOS SpriteKit game in Swift Guidance

//
//  HeroNode.swift
//  Space Cat Swift
//
//  Created by Kyler on 7/21/16.
//  Copyright © 2016 Kyler. All rights reserved.
//

import Foundation
import SpriteKit
import UIKit

struct HeroNode {

    let textures = [SKTexture(imageNamed: "spacecat_2"),
                    SKTexture(imageNamed: "spacecat_1")]

    func getHero(view: SKScene) -> SKSpriteNode {

        let hero = SKSpriteNode(imageNamed: "spacecat_1")
        hero.position = CGPoint(x: CGRectGetMidX(view.frame), y: 45)
        return hero
    }
}

//
//  GamePlayScene.swift
//  Space Cat Swift
//
//  Created by Kyler on 7/21/16.
//  Copyright © 2016 Kyler. All rights reserved.
//
import SpriteKit
import Foundation
import UIKit


struct MachineNode {

    let texturesArray = [SKTexture(imageNamed: "machine_1"),
                         SKTexture(imageNamed: "machine_2")]

    func getMachine(view: SKScene) -> SKSpriteNode {

        let machine = SKSpriteNode(imageNamed: "machine_1")

        machine.position = CGPoint(x: CGRectGetMidX(view.frame), y: 65)

        let machineAnimation = SKAction.animateWithTextures(self.texturesArray, timePerFrame: 0.4)

        let machineRepeat = SKAction.repeatActionForever(machineAnimation)

        machine.runAction(machineRepeat)

        return machine
    }
}

//
//  GameScene.swift
//  Space Cat Swift
//
//  Created by Kyler on 7/21/16.
//  Copyright (c) 2016 Kyler. All rights reserved.
//

import SpriteKit
import UIKit
import Foundation

class GameScene: SKScene {
    override func didMoveToView(view: SKView) {

        let background = SKSpriteNode(imageNamed: "splash_1")
        background.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
        background.size = CGSizeMake(CGRectGetMaxX(self.frame), CGRectGetMaxY(self.frame))
        self.addChild(background)
    }

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        let gamePlayScene = GamePlayScene(size: self.frame.size)
        let transition = SKTransition.crossFadeWithDuration(1)

        self.view?.presentScene(gamePlayScene, transition: transition)

    }

}

//
//  GamePlayScene.swift
//  Space Cat Swift
//
//  Created by Kyler on 7/21/16.
//  Copyright © 2016 Kyler. All rights reserved.
//
import SpriteKit
import UIKit
import Foundation

class GamePlayScene: SKScene {
    override func didMoveToView(view: SKView) {

        let background = SKSpriteNode(imageNamed: "background_1")
        background.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
        background.size = CGSizeMake(CGRectGetMaxX(self.frame), CGRectGetMaxY(self.frame))
        self.addChild(background)


        let machine: MachineNode = MachineNode()
        self.addChild(machine.getMachine(self))

        let spaceCat: HeroNode = HeroNode()
        self.addChild(spaceCat.getHero(self))

    }
}