How do I implement this Camera Tracking?

Hello everyone. I would like to know how to implement the camera tracking mechanism in this game: http://www.youtube.com/watch?v=t1BmumLZKQ0

Currently, this is my camera script: using UnityEngine; using System.Collections;

public class CameraRunnerScript : MonoBehaviour { public Transform player; public float cameraXPos = 5.6f; public float cameraYPos = 2.46f;

 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {
     transform.position = new Vector3 (player.position.x + cameraXPos, cameraYPos, -10);
 }

}

Any help or advice will be greatly appreciated. Thank you.