When I returned from the main menu, I think it's intentional that one of the ghosts yells "Boo!" at you, but then after that, I couldn't interact with any other options except to return the the menu. I tried a few times and it never let me click on anything else after that... u_u
I just ended up refreshing the page.
I would say, that it just feels a bit weird that I could go back into their rooms but not speak to them again. It didn't feel quite intentional. But I do understand it's a game jam game and you probably didn't have a lot of time to consider all of the minute details. I still had fun. :)