pixel_player21932232 Did you turn the handle after putting the pipes together? In terms of the basement door closing, while I walked back to the door after leaving the basement, I don't know that it did anything. Think the sign as there for 2 reasons:
1. Indicate where basement door is
2. Mess with us. The developers throw in funny things to keep us guessing.
The cats will move after other task complete.
Additionally, if you scroll through previous posts or even other threads, often the very answers you seek may have been already posted. That way, you're not left hanging and can dig away😊