public class Player : MonoBehaviour
{
        [SerializeField] private float speed;

        private Camera camera;
        private Vector2 touchPosition;
        private Vector2 offset;
        private Vector2 direction;
        private Rigidbody2D rb2d;

        private void Awake()
        {
                rb2d = GetComponent<Rigidbody2D>();
                camera = Camera.main;

                Input.multiTouchEnabled = false;

                direction = transform.position;
        }

        private void Update()
        {
                GetInput();
        }

        private void FixedUpdate()
        {
                rb2d.MovePosition(direction);
        }

        private void GetInput()
        {
                if (!Input.GetMouseButton(0)) return;

                touchPosition = camera.ScreenToWorldPoint(Input.mousePosition);

                if (Input.GetMouseButtonDown(0))
                {
                        offset = (Vector2)transform.position - touchPosition;
                }

                if (Input.GetMouseButton(0))
                {
                        direction = touchPosition * speed + offset;
                }

                if (Input.GetMouseButtonUp(0))
                {
                        direction = transform.position;
                }
        }
}