Bool paused in collision

Good day.

I making the movement script with bool paused. (if(col.gameObject.tag == "Bullet(Clone)") paused true... but it doesn't work.

Here is the code:

 public class Tank2 : MonoBehaviour {
 
     public GameObject Bullet;
     public float moveSpeed = 10f;
     public float turnSpeed = 120f;
     public Text Vyhra;
     public GameObject protivnik;
     public GameObject teleport;
     public Text ScoreA;
     public int TankA;
     public bool paused;
     void Start () {
         gameObject.GetComponent<Renderer>().material.color = Color.green;
         TankA = 0;
         SetTextA ();
     }
     void OnPausedGame (){
         paused = true;
     }
     void OnExitGame (){
         paused = false;
     }
 
     // Update is called once per frame
     void Update () {
         if (!paused) {
             if (Input.GetKey (KeyCode.W)) {
                 transform.Translate (Vector3.forward * moveSpeed * Time.deltaTime);
             }
             if (Input.GetKey (KeyCode.S)) {
                 transform.Translate (-Vector3.forward * moveSpeed * Time.deltaTime);
             }
             if (Input.GetKey (KeyCode.A)) {
                 transform.Rotate (-Vector3.up * turnSpeed * Time.deltaTime);
             }
             if (Input.GetKey (KeyCode.D)) {
                 transform.Rotate (Vector3.up * turnSpeed * Time.deltaTime);
             }
         }
     }
 void OnCollisionStay(Collision col) {
     if(col.gameObject.name == "Kulka(Clone)") {
         Destroy (col.gameObject);
         TankA = TankA + 1;
         SetTextA();
         StartCoroutine (dcoLoadLevel ("tanky", 5.0f));
     }
 }
 IEnumerator dcoLoadLevel(string tanky, float delay) {
     yield return new WaitForSeconds (delay);
     teleport.transform.position = new Vector3(13, 8f, 21);
     this.transform.position = new Vector3(18, 8f, 21);
 }
 void SetTextA(){
     ScoreA.text = "Score: " + TankA.ToString ();
     if (TankA >= 10) {
         Vyhra.text = "Vyhral cerveny hrac!";
         StartCoroutine (coLoadLevel ("menu", 5.0f));
     }
 }
 IEnumerator coLoadLevel(string Menu, float delay) {
     yield return new WaitForSeconds (delay);
     Application.LoadLevel (Menu);
 }
 }

Thank you for help