Player controller

using UnityEngine;
using System.Collections;

public class PlayerControler : MonoBehaviour
{
    public float speed;
    public GUIText countText;
    public GUIText WinText;
    private int count;
    private int cur_Level;
    private int Level_cap;
    public AudioClip Pickup_S;
    public AudioClip Win_S;
    public Vector3 lastGoodPosition;
    public Vector3 gravity;




    void Start ()
    {
        count = 0;
        cur_Level = 0;
        Level_cap = 4;
        SetCountText ();
        WinText.text = "";
        Physics.gravity = gravity;
    }



    void FixedUpdate()
    {
        float moveHorizontal = Input.GetAxis("Horizontal");
        float moveVertical = Input.GetAxis("Vertical");

        Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

        rigidbody.AddForce(movement * speed * Time.deltaTime);

        //if (gameObject.tag == "Player")
        //{
    //      Application.LoadLevel (Application.loadedLevel);
//      }

    }

    void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Pickup")
        {
            audio.PlayOneShot(Pickup_S, 0.7F);
            other.gameObject.SetActive(false);
            count = count + 1;
            SetCountText();

        }



    }



    void OnCollisionEnter(Collision collision)
    {
        if (collision.collider.tag == "Player")
        {
            lastGoodPosition = transform.position;
        }
        else if (collision.collider.tag == "PlaneofDeath")
        {
            transform.position = lastGoodPosition;
        }
    }


    void SetCountText()
    {
        countText.text = "Count: " + count.ToString();
        if (count >= 20)
        {
            WinText.text = "You WIN!";
            audio.PlayOneShot(Win_S, 0.7F);
            Level_cap = cur_Level +1;



            StartCoroutine(NextLevel());


        }
    }

    IEnumerator NextLevel()
    {
        yield return new WaitForSeconds(3);
        int i = Application.loadedLevel;
        //Application.LoadLevel(i + 1);

        if (i<=Level_cap)
        {
            Application.LoadLevel(i + 1);

        }
        else if (i>Level_cap)
        {
            Application.LoadLevel(0);
        }

    }




}