Scoreboard implementation part 1

Get scores from server
Submit score to server
Basic scoreboard scene

Assets/Scripts/Core/MenuManager.cs

@@ -0,0 +1,28 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class MenuManager : MonoBehaviour
+{
+    // Start is called before the first frame update
+    void Start()
+    {
+        
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+
+    public void StartGame()
+    {
+        UnityEngine.SceneManagement.SceneManager.LoadScene("Main");
+    }
+
+    public void QuitGame()
+    {
+        Application.Quit();
+    }
+}