private void SetUpMenu(ActorGainedLevelEventArgs args)
    {
        Perk[] perks = PerkCatalogue.GetPerksForLevelUp();

        if (perks.Length > 0)
        {
            Time.timeScale = 0f;
            gameObject.SetActive(true);

            DisplayHelper.Clear();

            for (int i = 0; i < Buttons.Length; i++)
            {
                if (i < perks.Length)
                {
                    DisplayHelper.Add(Buttons [i], perks [i]);
                    Buttons [i].gameObject.SetActive(true);                     // = true;

                    Buttons [i].GetComponentInChildren <Text> ().text = perks [i].Name;
                }
                else
                {
                    Buttons [i].gameObject.SetActive(false);
                }
            }
        }
    }