Simple Clicker Game

import SwiftUI

struct ContentView: View {
    @State private var timer: Timer?
    @State var Reload: Bool = false
    @State private var Money: Int = 0
    @State private var PerClick: Int = 1
    @State private var PerSecond: Int = 0
    @State private var DevValue1: String = ""

    var body: some View {
        VStack {
            DisclosureGroup("Admin") {
                Button("Reload") {
                    Reload = true
                    Reload = false
                }
                DisclosureGroup("Money") {
                    TextField("Amount Of Money", text: $DevValue1)

                    Button("Set") {
                        Money = Int(DevValue1) ?? Money
                    }
                    Button("Add") {
                        Money += Int(DevValue1) ?? 0
                    }
                    Button("Remove") {
                        Money -= Int(DevValue1) ?? 0
                    }
                }
            }
            GroupBox() {
                Button("+"+String(PerClick)+"$") {
                    Money += PerClick
                }
            }
            Text("Hello, world!")
            let Shop1 = GroupBox() {
                Button("+1 Per Click - 80$") {
                    if Money >= 80 {
                        Money -= 80
                        PerClick += 1
                    }
                }
                Text("\n")
                Button("+5 Per Click - 350$") {
                    if Money >= 350 {
                        Money -= 350
                        PerClick += 5
                    }
                }
            }
            let Shop2 = GroupBox() {
                Button("+1 Per Second - 170$") {
                    if Money >= 170 {
                        Money -= 170
                        PerSecond += 1
                        updateTimerInterval()
                    }
                }
                Text("\n")
                Button("+5 Per Second - 800$") {
                    if Money >= 800 {
                        Money -= 800
                        PerSecond += 5
                        updateTimerInterval()
                    }
                }
            }
            GroupBox("Stats") {
                LabeledContent("Money: ") {
                    Text(String(Money))
                }
                LabeledContent("Per Click: ") {
                    Text(String(PerClick))
                }
                LabeledContent("Per Second: ") {
                    Text(String(PerSecond))
                }
            }
            GroupBox("Shop") {
                TabView(selection: .constant(1)) {
                    Shop1.tabItem { Text("Per Click") }.tag(1)
                    Shop2.tabItem { Text("Per Second") }.tag(2)
                }
            }
        }
        // Start the timer when the view appears
        .onAppear(perform: startTimer)
        // Stop the timer when the view disappears
        .onDisappear(perform: stopTimer)
    }

    func startTimer() {
        // Use a timer to execute a closure with a dynamic interval
        timer = Timer.scheduledTimer(withTimeInterval: 1.0 / Double(PerSecond), repeats: true) { _ in
            // Increase money every second
            Money += 1
        }
    }

    func stopTimer() {
        timer?.invalidate()
    }

    func updateTimerInterval() {
        // Stop the current timer
        stopTimer()

        // Start a new timer with the updated interval
        startTimer()
    }
}