Pickups.cs

using UnityEngine;
using System.Collections;

public class Pickups : MonoBehaviour {

    public int charge = 0;
    public GameObject exit;


    void OnCollisionEnter2D(Collision2D col)
    {
        if (col.gameObject.tag == "EscapeCharge")
        {
            Destroy(col.gameObject);
            Debug.Log("Charge Pickup");
            charge = charge + 1;
        }
    }

    void Update()
    {
        //Batteries activating exit
        if (charge == 4)
        {
            GameObject spawn = Instantiate(exit, new Vector2(7, 7), Quaternion.Euler(0, 0, 0)) as GameObject;
            charge = 6;

            //    exit.SetActive(true);
            Debug.Log("ExitOpened");

        }
    }
}