All in one ?

[tranvanhieu]

Do you mean the gate that you open by pressing every note on the organ at once? That's the only door I can think of in the courtyard...

There is probably one door in the courtyard.
But open it by pressing the piano? I did press them all but nothing happen,maybe I didn't pressed all at once?
But if you opend it,then what is inside???
I guess there were just some normal items (since I see no one talk about this).