Sistema de variables globales

GameControl.cs

using UnityEngine;
using System.Collections;

public class GameControl : MonoBehaviour {

	public int puntuacion = 0;
	public int vidas = 3;

	public static GameControl gamecontrol;

	void Awake(){
		if (gamecontrol == null) {
				gamecontrol = this;
				DontDestroyOnLoad (gameObject);
			} else if (gamecontrol != this) {
				Destroy (this);
			}
	}

	public void Level2(){
		Application.LoadLevel ("escena2");
	}
}