我正在创建一个单页游戏，你选择一个圆圈，得分水平增加。我几乎完成了，但我的点击手势对圆圈不起作用。我试过下面的代码，但它不工作。请检查下面的代码。

import UIKit
import AVFoundation

class Demogame: UIViewController {

    @IBOutlet weak var scoreLabel: UILabel!

    var score = 0
    var isGameOver = false

    override func viewDidLoad() {
        super.viewDidLoad()
        startGame()
    }

    func startGame() {
        score = 0
        scoreLabel.text = "Score: \(score)"
        isGameOver = false

        // Create a timer to spawn circles
        Timer.scheduledTimer(withTimeInterval: 2.0, repeats: true) { timer in
            if !self.isGameOver {
                self.spawnCircle()
            } else {
                timer.invalidate()
            }
        }
    }

    func spawnCircle() {
        let circleSize = CGSize(width: 50, height: 50)
        let circleView = UIView(frame: CGRect(origin: CGPoint(x: CGFloat.random(in: 50...view.frame.width - circleSize.width - 50),
                                                              y: CGFloat.random(in: 100...view.frame.height - circleSize.height - 50)),
                                              size: circleSize))

        circleView.backgroundColor = UIColor.random()
        circleView.layer.cornerRadius = circleSize.width / 2
        view.addSubview(circleView)

        // Add a tap gesture recognizer to each circle
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))
        circleView.addGestureRecognizer(tapGesture)

        // Animate the circle's appearance and disappearance
        UIView.animate(withDuration: 3.0, animations: {
            circleView.alpha = 0.0
        }) { (completed) in
            if completed {
                circleView.removeFromSuperview()
            }
        }
    }

    @objc func handleTap(_ sender: UITapGestureRecognizer) {
        if isGameOver {
            return
        }

        if let tappedView = sender.view {
            tappedView.removeFromSuperview()
            score += 1
            scoreLabel.text = "Score: \(score)"
        }
    }
}

extension UIColor {
    static func random() -> UIColor {
        return UIColor(
            red: CGFloat.random(in: 0.0...1.0),
            green: CGFloat.random(in: 0.0...1.0),
            blue: CGFloat.random(in: 0.0...1.0),
            alpha: 1.0
        )
    }
}

问：如何点击手势工作的圆圈和增加得分水平？
有人可以请向我解释如何做到这一点，我已经尝试了上述代码，但还没有结果。如果我做错了请纠正我。
任何帮助将不胜感激