This series of games starts with a simple puzzle in the first entry (just a locked door) but adds puzzles every time.
This entry is quite complex compared to earlier entries, with a broad map, numerous tools and items, an NPC, easter eggs, etc.
However, some bugs and typos have crept in, like 'bathroom' being lower case and some synonyms not being set (like for the (Spoiler - click to show)safe, where 'set' and 'turn' don't work but 'turn' does).
So the game isn't polished, but it is more descriptive and compelling than the others.