Ah yes, give me a game I can map and I'll be happy for hours. I didn't care much for William Mataga's "Shamus: Case II" back in 1983, but thanks to the joy of emulation -- and the instructions here -- I can finally enjoy the game. And win it. On the Novice level. By saving it an awful lot.
I couldn't find any online maps or spoilers for Shamus 2, so here are mine. I'm sorry the map isn't very pretty (click for a larger version).
And here are the spoilers: there are 38 rooms, the devilish "sliding ladders" start to appear in room 27, and the only way across room 20 is to fall down into the ingenious "hidden room" (17).
Room 38 contains a "detonator." After you've armed it you need to get back to room zero (which you can do in ten moves), at which time you're told that "The Shadow is dead on this level" and you start at the Intermediate level. The instructions say that you actually DO BATTLE with The Shadow, so I assume that eventually you do get to meet him.
It's a nifty game with neat cross-genre appeal, but the real joy for me is the joy of mapping. The higher levels are probably the same, maybe with different obstacles...YOU can find out!