Unity Move Game Object With Finger swipe

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using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Ball : MonoBehaviour
{
 private Rigidbody2D ball;
    public float BallSpeed;
    public float turnSpeen = 1;
 public float smoothTime;

    public GameObject Lose;
 Vector3 vel;
 // Use this for initialization
 void Start () {
        Lose.SetActive(false);

        ball = GetComponent<Rigidbody2D> ();
 }
 
 
 void FixedUpdate()
    {// 
        ball.velocity = new Vector2 (0, 1*BallSpeed);

  Vector3 pos =  Camera.main.ScreenToWorldPoint(Input.mousePosition);

        transform.position = Vector3.SmoothDamp (
                transform.position,
                new Vector3(pos.x, transform.position.y, transform.position.z),
                ref vel, 
                smoothTime
                );

  
 }

    void OnCollisionEnter2D(Collision2D col)
    {
        Lose.SetActive(true);
        print(col.gameObject.name);
    }
}