First thing I thought of, too. There were lots of things you could do that would make the game unwinnable. Like in the first one, leaving a gate open would allo

First thing I thought of, too. There were lots of things you could do that would make the game unwinnable. Like in the first one, leaving a gate open would allow a goat to wander off and you needed the goat later. In another one, you there was a fire that would go out X screen changes after finding it for the first time, and you needed embers from it. This article seems to directly call out a lot of the King's Quest mechanics and puzzles.