UI ups

Assets/Scripts/UI/UIManager.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+public class UIManager: MonoBehaviour
+{
+    public enum UIState
+    {
+        MainMenu = 0,
+        Game = 1,
+        Pause = 2,
+        HowToPlay = 3,
+        StageSelect = 4,
+        ConfirmQuit = 5,
+    }
+    
+    public List<UIState> StateStack = new List<UIState>() {UIState.MainMenu};
+    
+    public GameObject MainMenu;
+    public GameObject Reticle;
+    public GameObject HowToPlay;
+    public GameObject StageSelect;
+    public GameObject ConfirmQuit;
+
+    public void Start()
+    {
+        MainMenu.SetActive(false);
+        Reticle.SetActive(false);
+        HowToPlay.SetActive(false);
+        StageSelect.SetActive(false);
+        ConfirmQuit.SetActive(false);
+        
+        PushState(UIState.MainMenu);
+    }
+
+    public void PushState(UIState state)
+    {
+        if (StateStack.Count > 0)
+        {
+            OnExitState(StateStack[0]);
+        }
+        
+        StateStack.Add(state);
+        OnEnterState(state);
+    }
+    
+    public void PopState()
+    {
+        if (StateStack.Count > 0)
+        {
+            OnExitState(StateStack[0]);
+            StateStack.RemoveAt(0);
+        }
+    }
+
+    private void OnEnterState(UIState state)
+    {
+        switch (state)
+        {
+            case UIState.MainMenu:
+                MainMenu.SetActive(true);
+                break;
+            case UIState.Game:
+                Reticle.SetActive(true);
+                break;
+        }
+    }
+    
+    private void OnExitState(UIState state)
+    {
+        switch (state)
+        {
+            case UIState.MainMenu:
+                MainMenu.SetActive(false);
+                break;
+            case UIState.Game:
+                Reticle.SetActive(false);
+                break;
+        }
+    }
+
+    public void StartStage(int stage)
+    {
+        Scoreboard.Instance.StartStage((StagingManager.StageEnum)stage);
+        PushState(UIState.Game);
+    }
+
+    public void Quit()
+    {
+        Application.Quit();
+    }
+}

Assets/Scripts/UI/UIManager.cs.meta

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+fileFormatVersion: 2
+guid: 1d007036093842af8034f1c5e5c1e7e8
+timeCreated: 1724110214