using UnityEngine;
  using System.Collections;
  
  public class MainMenuScript : MonoBehaviour {
  
      void Awake()
      {       
          //Make this script persistent(Not destroy when loading a new level)
          DontDestroyOnLoad(this);
  
          Time.timeScale = 1.0f; //In case some game does not UN-pause..
      }
  
          void OnGUI () {    
  
          //Detect if we're in the main menu scene
          if (Application.loadedLevel == 0)
          {
              MainMenuGUI();
          }
          else
          {
              //Game scene
              InGameGUI();
          }        
          }
  
      void StartGame(int nr)
      {
          Application.LoadLevel(nr);
      }
  
      public GUIStyle invisibleButton;
  
      void MainMenuGUI()
      {
          int leftPix = (Screen.width - 600) / 2;
          int topPix = (Screen.height - 450) / 2;
  
          if (GUI.Button(new Rect(leftPix, topPix, 204, 158), "", invisibleButton))
          {
              StartGame(1);
          }
          if (GUI.Button(new Rect(leftPix + 204, topPix, 204, 158), "", invisibleButton))
          {
              StartGame(2);
          }
          if (GUI.Button(new Rect(leftPix + 204 * 2, topPix, 204, 158), "", invisibleButton))
          {
              StartGame(3);
          }
  
          if (GUI.Button(new Rect(leftPix, topPix + 290, 204, 158), "", invisibleButton))
          {
              StartGame(4);
          }
          if (GUI.Button(new Rect(leftPix + 204, topPix + 290, 204, 158), "", invisibleButton))
          {
              StartGame(5);
          }
          if (GUI.Button(new Rect(leftPix + 204 *2, topPix + 290, 204, 158), "", invisibleButton))
          {
              Application.OpenURL("http://www.M2H.nl");
          }
  
          GUI.color = Color.black;
  
          GUILayout.BeginArea(new Rect(Screen.width/2-150, Screen.height/2-100, 300, 200));
          GUILayout.BeginHorizontal();
          GUILayout.FlexibleSpace();
  
          GUILayout.BeginVertical();
          GUILayout.FlexibleSpace();
  
          GUILayout.Label("Select a game!");
         
          GUILayout.FlexibleSpace();
          GUILayout.EndVertical();
  
          GUILayout.FlexibleSpace();
          GUILayout.EndHorizontal();
          GUILayout.EndArea();
  
      }
  
      void InGameGUI()
      {
          //Top-right
          GUILayout.BeginArea(new Rect(0, 0, Screen.width, 50));
          GUILayout.BeginHorizontal();
          GUILayout.FlexibleSpace();
          if (GUILayout.Button("Back to menu"))
          {
              Destroy(gameObject); //Otherwise we'd have two of these..
              Application.LoadLevel(0);
          }
          GUILayout.EndHorizontal();
          GUILayout.EndArea();
      }
  
  }