I remember playing this back in the day on my Atari ST, and replaying it now, I find I really don't remember any part of the actual game at all. The story is ultimately unremarkable and this game does not qualify as a classic by any stretch. Still, for free, you might want to waste and afternoon on it.
I remember it being much hailed, at the time, for it's "virtual theater" system, which allows NPCs to wander around the game and engage in conversations with each other, but in practice, it's mostly annoying when your conversation with an NPC is interrupted by two other NPCs talking, or an NPC steps in your way when you are trying to move around.
I won't criticize a 17 year old game for poor graphics and sound, which some reviewers seem to insist on doing, it was pretty good for the time, but obviously hasn't aged well.
Note: This version does have a bug near the end of the game that prevents you from completing it, but it can be fixed with the latest snapshot of the ScummVM (see the GOG forums).