First of all: Possessing a roomba is so funny.
I did like the idea of being a ghost trying to get the house ready. While playing I didn't really notice any changes though? Also I would've liked to turn the view by mouse instead of keyboard because it felt a little slow.
I think if you added a few more decorations and more mechanics like you did with the roomba it could be a fun and short game. Maybe even put a timer in or like a queue on how much time is left or something like that.
Still good work on the game jam game :)