Following Camera 2D Unity

using UnityEngine;
using System.Collections;

public class Camera2d : MonoBehaviour {

    //quem ele vai seguir
    public Transform player;

    public float smoothrate = 0.5f;

    public Transform thisTransform;
    public Vector2 velocity;


    // Use this for initialization
    void Start () {
        thisTransform = transform;
        velocity = new Vector2 (0.5f, 0.5f);
    }


    void Update () {
        Vector2 newPos2D = Vector2.zero;

        newPos2D.x = Mathf.SmoothDamp (thisTransform.position.x,
                                       player.position.x, ref velocity.x, smoothrate);

        newPos2D.y = Mathf.SmoothDamp (thisTransform.position.y,
                                       player.position.y, ref velocity.y, smoothrate);

        //atualiza a camera para a localizao do player
        Vector3 newPos = new Vector3 (newPos2D.x, newPos2D.y, Transform.position.z);
        transform.position = Vector3.Slerp (transform.position, newPos, Time.time);

    }
}