Nedd help with character controller

Hi guys i am new to unity. i am working on a game where the character which is a ball needs to move with the help of mouse as i move mouse forward the ball goes forward and vise verca and same works for the directions mean the ball can go left and right with the help of a mouse. currently i am doing it with the help of input keys . a script would be appreciated. link for controller https://www.youtube.com/watch?v=ijGD49NmA7E

Player Controller

using UnityEngine; using System.Collections;

public class PlayerController : MonoBehaviour {

 public float speed;

 public GameObject camera;

 void FixedUpdate()
 {
     float movementHorizontal = Input.GetAxis("Horizontal");
     float movementVertical = Input.GetAxis("Vertical");

     Vector3 movementVector = new Vector3(movementHorizontal, 0.0f, movementVertical);
         movementVector = camera.transform.TransformDirection(movementVector);

     GetComponent<Rigidbody>().AddForce(movementVector * speed * Time.deltaTime);
 }

}

CameraController.cs

using UnityEngine; using System.Collections;

public class PlayerCameraController : MonoBehaviour {

 private GameObject player;
 private Vector3 offset;
 private float boardTiltMax = 15f; // Maximum angle to tilt the camera to fake the level tilting
 private Vector3 desiredPosition;
 private GameObject desiredPositionObject;

 private float rotationDamping = 10f;
 private float movementDamping = 150f;
 private float turnSpeed = 300f;

 private float turnAngle = 0.0f;

 // Use this for initialization
 void Start()
 {
     offset = transform.position;
     desiredPosition = transform.position;
     desiredPositionObject = new GameObject("cameraFollow");
     DontDestroyOnLoad(desiredPositionObject);
     desiredPositionObject.transform.position = transform.position;

     // fine the player object
     player = GameObject.Find("Player");

     if (player == null)
     {

         Debug.LogError("Could not find object \"Player\" ! Aborting GameCamera load.");
         DestroyImmediate(gameObject);
     }
 }

 void Update()
 {
     // Rotate the camera around the ball to adjust movement when Q or E are pressed (left/right movement)
     turnAngle += Input.GetAxis("Turn") * turnSpeed * Time.deltaTime;
 }

 void LateUpdate()
 {
     // find the ZX direction from the player to the camera
     var heading = transform.position - player.transform.position;
     heading.y = 0f;
     var distance = heading.magnitude;
     var direction = heading / distance;

     // Find the right vector for the diretion
     var rotationVectorRight = Vector3.Cross(direction, Vector3.up);

     // Move the camera
     desiredPositionObject.transform.position = player.transform.position + offset;

     // Rotate around the players Y axis by the turn value
     desiredPositionObject.transform.RotateAround(player.transform.position, Vector3.up, turnAngle);

     // Deal with forward/backward board rotation
     desiredPositionObject.transform.RotateAround(player.transform.position, rotationVectorRight, -Input.GetAxisRaw("Vertical") * boardTiltMax);

     // Ensure we're looking at the player before the roll rotation is applied
     desiredPositionObject.transform.LookAt(player.transform.position);

     // Apply the roll rotation
     desiredPositionObject.transform.RotateAround(desiredPositionObject.transform.position, direction, -Input.GetAxisRaw("Horizontal") * boardTiltMax);

     // Lerp the cameras position to match the target object
     transform.position = Vector3.Slerp(transform.position, desiredPositionObject.transform.position, Time.deltaTime * movementDamping);

     // Lerp the cameras rotation to match the target object
     transform.rotation = Quaternion.Lerp(transform.rotation,
                                           desiredPositionObject.transform.rotation,
                                           Time.deltaTime * rotationDamping);

     // Re-center the camera on the object to account for new roll rotation
     CenterCameraOnTarget();

 }

 private void CenterCameraOnTarget()
 {
     Plane plane = new Plane(transform.forward, player.transform.position);
     Ray ray = GetComponent<Camera>().ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2, 0.0f));
     float distance;
     plane.Raycast(ray, out distance);

     var point = ray.GetPoint(distance);
     var offset = player.transform.position - point;
     transform.position += offset;

} }