“How can a player move in the world?”
We generally think of Sudd City Adventures as part point and click game and part interactive fiction, however from a camera perspective it has a lot more to do with a visual novel. This mostly comes from the fact that we’re assumed to be from the point of view of our player character, as opposed to a third person animated avatar like in old LucasArts games where players basically moved their character into a hallway to signal a room change.