Submitted by: rickHH
On the left-hand side of the top level of the room
with the buzz-saw robots, if you jump and press
attack at the top of the arc it will open the door
to a secret treasure room to your left.
The same holds true in the room with the
spear-throwers and the steel bars across some of
the hallways. Both of these rooms are in the fourth
area and you have to be pretty darn good to be there.