did a minor tweak

Assets/Scripts/MenuController.cs

@@ -0,0 +1,42 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class MenuController : MonoBehaviour
+{
+    public GameObject pauseMenu;
+    public bool isPaused;
+
+    // Update is called once per frame
+    void Update()
+    {
+        if (Input.GetKeyDown(KeyCode.Escape))
+        {
+            if (isPaused)
+            {
+                ResumeGame();
+            }
+            else
+            {
+                isPaused = true;
+                pauseMenu.SetActive(true);
+                Time.timeScale = 0f;
+            }
+
+        }
+    }
+
+    public void ResumeGame()
+    {
+        isPaused = false;
+        pauseMenu.SetActive(false);
+        Time.timeScale = 1f;
+    }
+
+    public void ReturnToMain()
+    {
+        Time.timeScale = 1f;
+        SceneManager.LoadScene("Main Menu");
+    }
+}