fix the errors in my code

import UIKit import AVFoundation

class ViewController: UIViewController {

@IBOutlet weak var player: UIImageView!
@IBOutlet weak var enemy: UIImageView!
@IBOutlet weak var scoreLabel: UILabel!
@IBOutlet weak var gameOverLabel: UILabel!
@IBOutlet weak var levelLabel: UILabel!
@IBOutlet weak var powerUp: UIImageView!
@IBOutlet weak var powerUpLabel: UILabel!

var score = 0
var gameOver = false
var level = 1
var powerUpActive = false
var powerUpTime = 0
var backgroundMusic: AVAudioPlayer!
var enemyDeathSound: AVAudioPlayer!
var powerUpSound: AVAudioPlayer!

override func viewDidLoad() {
    super.viewDidLoad()
    
    // Add swipe gestures
    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(swipeLeft))
    leftSwipe.direction = .left
    view.addGestureRecognizer(leftSwipe)
    
    let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(swipeRight))
    rightSwipe.direction = .right
    view.addGestureRecognizer(rightSwipe)
    
    // Load sound effects
    loadSounds()
    
    // Start the enemy moving
    moveEnemy()
    
    // Start the game loop
    Timer.scheduledTimer(timeInterval: 0.01, target: self, selector: #selector(gameLoop), userInfo: nil, repeats: true)
}

func loadSounds() {
    let backgroundMusicPath = Bundle.main.path(forResource: "background", ofType: "mp3")
    let backgroundMusicUrl = URL(fileURLWithPath: backgroundMusicPath!)
    
    do {
        backgroundMusic = try AVAudioPlayer(contentsOf: backgroundMusicUrl)
        backgroundMusic.numberOfLoops = -1
        backgroundMusic.prepareToPlay()
        backgroundMusic.play()
    } catch {
        print("Error loading background music")
    }
    
    let enemyDeathSoundPath = Bundle.main.path(forResource: "enemyDeath", ofType: "wav")
    let enemyDeathSoundUrl = URL(fileURLWithPath: enemyDeathSoundPath!)
    
    do {
        enemyDeathSound = try AVAudioPlayer(contentsOf: enemyDeathSoundUrl)
        enemyDeathSound.prepareToPlay()
    } catch {
        print("Error loading enemy death sound")
    }
    
    let powerUpSoundPath = Bundle.main.path(forResource: "powerUp", ofType: "wav")
    let powerUpSoundUrl = URL(fileURLWith