public void onKeyIsPickedUp (GameObject obj, bool tr ){
Interactable inter = obj.GetComponent<Interactable>();
if(inter != null && inter.getPuzzleState() == "notPickedUp"){
r_Key = inter;
r_Key.setPuzzleState("pickedUp");
gameObject.GetComponentInChildren<Behaviour_DoorSimple>().unlockDoor();
}
}