you need to know how to do 3 things in the game: switch the view, spring a trap, and change the trap access code.
(dont know what buttons do what actions right now)
to switch the camera, move the cursor over the room selector and hit the appropriate button.
to capture a bad guy(in all black), push the appropriate button when the flashing meter gets to the red zone.
to change the code, push whatever button and it'll change on screen. you'll have to watch the people talking at the right time to pick up on code changes.
the 1 problem with playing on an emulator is that they don't support swapping discs, which you need to do to finish the game.