Не могу понять почему персонаж бежит налево

public class heroScript : MonoBehaviour {
 
    Animator anim;
    Rigidbody2D rb;
    public GameObject btnLeft;
    public GameObject btnRight;
    public GameObject btnJump;
    float PosBtnJump;
    float PosBtnLeft;
    float PosBtnRight;
    float run;
 
 
 
    // Use this for initialization
    void Start () {
        PosBtnLeft = btnLeft.transform.position.y;
        PosBtnRight = btnRight.transform.position.y;
        PosBtnJump = btnJump.transform.position.y;
        rb = GetComponent<Rigidbody2D> ();
        anim = GetComponent<Animator> ();
    }
    
    // Update is called once per frame
    void Update () {
        if (PosBtnLeft != btnLeft.transform.position.y) {
            run = -3f;
        } else if (PosBtnRight != btnRight.transform.position.y) {
            run = 3f;
        } else {
            run = 0f;
        }
 
        rb.velocity = new Vector2 (run, rb.velocity.y);
        
    }
 
}
 
 
 
 
другой файл: public class btn : MonoBehaviour, IPointerDownHandler,IPointerUpHandler {
 
    // Use this for initialization
    public void OnPointerDown (PointerEventData eventData) {
        transform.position = new Vector2 (transform.position.x, transform.position.y + 1f);
    }
    
    // Update is called once per frame
    public void OnPointerUp (PointerEventData eventData) {
        transform.position = new Vector2 (transform.position.x, transform.position.y - 1f);
    }
 
 
}