...
if (Physics.Raycast(ray, out hit)) {
  GameObject hitObject = hit.transform.gameObject; 
  ReactiveTarget target = hitObject.GetComponent<ReactiveTarget>();
  if (target != null) {                   
    Debug.Log("Cel został trafiony.");
  } else {
    StartCoroutine(SphereIndicator(hit.point));
  }
}
...
