Script 1

public class FlyTouch : MonoBehaviour
{
    public int currentScore;
    public TextMeshProUGUI textScore;
    Collider2D col;

    void Start()
    {
        col = GetComponent<Collider2D>();
    }

    void Update()
    {
        textScore.text = currentScore.ToString();
        FlyTouchAndScore();

    }
    public void FlyTouchAndScore()
    {
        if (Input.touchCount > 0)
        {
            Touch touch = Input.GetTouch(0);
            Vector2 touchPosition = Camera.main.ScreenToWorldPoint(touch.position);
            if (touch.phase == TouchPhase.Began)
            {
                Collider2D touchedCollider = Physics2D.OverlapPoint(touchPosition);
                if (col == touchedCollider)
                {
                    currentScore += 1;

                }
            }
        }
    }