Locked Door III feels very much like a combination of the two previous Locked Door games. The puzzles are not overly complicated, but the gameplay does require both object manipulation and NPC interaction. The map is small, but the locations have their own unique personalities.
I didn’t notice any typos, but I did encountered a bug. I was able to finish the game with a score of four out of three, which I am pretty sure is something that I am not suppose to be able to do.
Compared to the two previous games, Locked Door III feels the most like an actual puzzle, albeit a very small one. If you are thinking about getting into this series, I would recommend skipping the two previous entries and starting with this one.