It doesn’t make sense that the museum is the only house with creaky floors so maybe add creaky floors to all houses to make the game harder and challenging.
Crime scene: add creaky floors to every hallway and maybe 2 rooms.
Bakery: creaky floors should be on the upstairs.
Taxidermist: creaky floors in every room.
Mayor: creaky floors in only the hallways.
Museum: already has creaky floors.