How do I my operators properly in Unity in c#

My operators on my script are in correct . I need the operators to be set so numbers is below number I set for the scene change and I need the operator set to when the countdown timer reaches zero . So here is my script :

using UnityEngine; using System.Collections; using UnityEngine.UI; using UnityEngine.SceneManagement; public class Game : MonoBehaviour {

private MyClockScript myClock; void Start () { myClock = GetComponent(); }

 // Update is called once per frame
 void Update () {
  if (myClock.m_leftTime < 0 || GameManagerSingleton.score > 0)
        {
            SceneManager.LoadScene("ui");
        }
 }

}