Added a pause-menu

Assets/Scripts/UI/PauseMenu.cs

@@ -0,0 +1,46 @@
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class PauseMenu : MonoBehaviour
+{
+    [SerializeField] Canvas m_Canvas;
+
+    private bool m_Paused = false;
+
+    private void UpdateState()
+    {
+        m_Canvas.enabled = m_Paused;
+        Time.timeScale = m_Paused ? 0.0f : 1.0f;
+
+        Cursor.visible = m_Paused;
+        Cursor.lockState = m_Paused ? CursorLockMode.None : CursorLockMode.Locked;
+    }
+
+    private void Start()
+    {
+        UpdateState();
+    }
+
+    private void Update()
+    {
+        // Toggles the paused state if the ESC key is pressed //
+        if (Input.GetKeyDown(KeyCode.Tab) && PlayerMovement.Instance().IsDead() == false)
+        {
+            m_Paused = !m_Paused;
+
+            UpdateState();
+        }
+    }
+
+    public void Unpause()
+    {
+        m_Paused = false;
+        UpdateState();
+    }
+
+    public void MainMenu()
+    {
+        Time.timeScale = 1.0f;
+        SceneManager.LoadScene(0);
+    }
+}