How i do a clicker with moving objects?

Hi! My problem is i do right now clicker where objects moving and when you click it you get a point. I tried 2 difrent code but they don't work. Help me please. Here the code:

 public class click : MonoBehaviour//first
 {
     public int score;
 
      void Update()
     {
         if (Input.GetMouseButtonDown(0))
         {
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 
 
             RaycastHit hit;
             if (Physics.Raycast(ray, out hit))
             {
                 score++;
             }
         }
     }
 
 }

2

 public class click : MonoBehaviour//second

{

     public int score;
 
      void onClick()//event trigger is using
 {
 score++;
 }

}