My biggest criticisms are that the game doesn't have a way to adjust the volume - the constant rumbling background noise really isn't necessary - or any options, and the constant bobbing of the mouse cursor makes it very difficult to do much of anything. The door code puzzle was infuriating to try and do because the cursor kept bobbing and making me hit the wrong number. Eventually gave up, so I don't know how the rest of the game went but those two things combined made this unplayable for me.