Really good shit. Simple but interesting gameplay gimmick with the 2-digit binary code actions, although I feel the spooky bits would have been more effective if they were timed. The graphics prove that you don't need +1.000.000.000 polygon models and Omegatracing lighting to create a great atmosphere. There's some vague but interesting lore going on.
My only gripe is that the controls feel a bit off, the actions are done with the mouse but the movement is done with the arrows keys, no WASD. Personally, I would have taken advantage of the old computer terminal look and added four directional clickable buttons so everything is done with the mouse.