Scoreboard implementation part 1

Get scores from server
Submit score to server
Basic scoreboard scene

Assets/Scripts/Core/GameManager.cs

@@ -34,6 +34,8 @@ public class GameManager : MonoBehaviour
     // Start is called before the first frame update
     void Start()
     {
+        //dont destroy on load
+        DontDestroyOnLoad(this.gameObject);
         player = GameObject.FindGameObjectWithTag("Player").GetComponent<Player>();
 
         StartWave();
@@ -111,4 +113,9 @@ public class GameManager : MonoBehaviour
         SceneManager.LoadScene(SceneManager.GetActiveScene().name);
         
     }
+
+    public void OpenScoreboard()
+    {
+        SceneManager.LoadScene("Scoreboard");
+    }
 }