If you are looking to get an 'A' grade you need to find all the golden
mice. To find the mice, go into 1st person mode with the gameboy horror
and click onto hidden cheeses with the A button. These cheeses can be
found in:
The
second floor study behind a desk.
The first floor dining room underneath a chair.
The second floor dining room at the back.
The first floor room with the crystal ball behind the fortune teller.
The third floor trophy room behind a chair.
The second floor corridor near the stairs to the attic, you hear a chime
and a mouse runs up the corridor. (You do not need to find cheese for
this one).
As
soon as you click on a cheese a mouse appears, go back to third person
view and suck up that mouse quick for much cash and the occasional gem.
The
mice can only be caught before the lights come on in any room. So get
the mouse and then the ghosts. If you miss the cheeses the first time
around; after the third boss when the lightning trips the power and the
mansion is in darkness again, go mouse hunting, although in some rooms
now there are loads of ghosts, so it's not so easy as it was first time
round.