The original Crowther and Woods game took up a massive 300K! Level 9 managed to squeeze their version into 48K.
I'm not sure why but the black text on a white background is really annoying. More annoying still is not being able to carry more than four items resulting in lots of back-tracking to pick up items you didn't have room to carry earlier. And for some reason the "examine" command doesn't seem to do anything.
3/5.
The updated version on the Jewels of Darkness compilation fixes the above problems so I'm upgrading my mark to 4/5.