unity problem .2

using UnityEngine;


public class ROCKET : MonoBehaviour

{

    AudioSource AS;
    AudioClip AC;
    Rigidbody RB;


    public AudioClip Explosion;



    public float RotationThrust = 1000f;
    public float UpThrust = 1000f;

    public ParticleSystem Thrust;
    public ParticleSystem Fail;
    public ParticleSystem Win;

   enum PlayerSituation {Alive,Died,Win };

    PlayerSituation Situation;

    void Start()
    {


        RB = GetComponent<Rigidbody>();
        AS = GetComponent<AudioSource>();



    }
    // Update is called once per frame

    void Update()  // action qui doit se faire chaque secondes//

    {


        if (Situation == PlayerSituation.Alive)
        {

            Up();
            Rotate();
        }















    }









    private void OnCollisionEnter(Collision collision)
    {
        if (Situation!=PlayerSituation.Alive)
        {
            return;   // remove the other collision after the death//not for the rocket



        }

        switch (collision.gameObject.tag)
        {


                 case "DANGER!":
               Situation = PlayerSituation.Died;
                Thrust.Stop();
                Fail.Emit(10000);
                AS.Stop();
                AS.PlayOneShot(Explosion);
                break;

            case "WIN":

                Debug.Log(collision.gameObject.tag);
                Win.Play();


                break;

        }



    }









    void Up()     // propulsion of rocket//
    {


        float upPlus = UpThrust * Time.deltaTime;    // add more propulsion//


        if (Input.GetKey(KeyCode.W)) // my rocket doesn't want to work ---> maybe this is the problem
        {
            RB.AddRelativeForce(Vector3.up * upPlus);


            if (!AS.isPlaying)
            {

                AS.Play();


            }

            Thrust.Play();







        }

        else
        {

            Thrust.Stop();
            AS.Stop();

        }






    }

















    void Rotate()   //rotation of the rocket//
    {
        float rotationPlus = RotationThrust * Time.deltaTime;


        RB.freezeRotation = true;
        if (Input.GetKey(KeyCode.A))
        {
            transform.Rotate(transform.forward * rotationPlus);



        }

        else if (Input.GetKey(KeyCode.D))
        {


            transform.Rotate(-transform.forward * rotationPlus);




        }
        RB.freezeRotation = false;





    }



 }