Just one thing:
M-(The submarine) Escaping from the submarine : 9 points.
I've seen this listed for 9 points in about three different places, but when I escape the submarine, I don't get 9 points, and in the end, I'm stuck at 991. I've tried on both SCUMMVM and DOSBOX (through the Steam download), but neither gives 9 points for escaping. I'm doing it the right way by tying the clothesline to the lever, priming the tube, climbing in then pulling on the line. I can hear the music play that says IQ should be earned, but it doesn't give me any points.
Does anyone have any advice?