private void Start()
{
for (int i = 0; i < GameManager.Instance.mapManager.currentMap.AvailableTowers.Length; i++)
{
GameObject towerButton = Instantiate(towerButtonPrefab);
towerButton.transform.SetParent(panel, false);
TowerBuildButton buildButton = towerButton.GetComponent <TowerBuildButton>();
buildButton.InitializeButton(GameManager.Instance.mapManager.currentMap.AvailableTowers[i]);
}
}