Welcome, Adventurer, to the Great Underground Empire.
The trick behind this web implementation is that it saves and exits automatically after every move, and restarts the program and restores when you submit the web form (this means that it is not running and hogging my poor 486's CPU when you are just looking at the pages). Because of this theft of the load/save code, regular load and save is somewhat broken, and at the end of the game where there is a section that requires saving to be disabled, we expect there to be problems. I'm rather hoping no-one gets that far before I get explicit load and save working fully.
And yes, the Game ID numbers that are used to record your personal
game state are completely predictable, and if you felt so inclined
you could easily hijack someone else's game. In fact it's so easy
to do, there's no challenge in it at all, so why bother? I can't
be bothered writing password code and I can't be bothered helping
people who forget their passwords, so let's just leave it wide fucking
open and assume everyone plays nice. (Before you ask - I remembered to
disable shell escapes. What sort of an idiot do you take me for?)
If you get totally stuck, here's a walk-through for Dungeon. Try not to read it if you plan to finish the game.