I didn’t understand it because of a bug. When she entered my office and I tried to stop her (even though she hadn’t broken the doors yet), I clicked on the mushroom and it didn’t disappear. Then she laughed again and broke the doors. So I thought it wasn’t supposed to work like that.
Then I realized it might be a bug.
(I know I said in the other comment that it was because of my low English, but I thought it was because of that).
But apart from that, everything was fine :D