public class PlayerMove : MonoBehaviour {
Vector3 cursPosition;
Vector3 nextPosition;
public float speed;
bool isMove = false;
// Use this for initialization
void Start () {
isMove = false;
cursPosition = transform.position;
nextPosition = transform.position;
}

// Update is called once per frame
void Update () {

if(Input.GetMouseButtonDown(0))
{
isMove = true;
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
if(Physics.Raycast(ray,out hit))
{
nextPosition = hit.point;
}

}
if (cursPosition != nextPosition && isMove) {
transform.position = Vector3.MoveTowards(transform.position,nextPosition,Time.deltaTime*speed);
transform.LookAt (nextPosition);
if(transform.position == nextPosition)
{
isMove = false;
}
}
}
}