First off, amazing job. The inn is lovely, and to me it reminds me even more of the Strahd's Possession Blood o' the Vine than the one before, somehow.
Though there are some small issues. Except the public room key, none of the keys bought from the innkeep work on the rooms upstairs. Private rooms are all unlocked and company rooms are all locked. Also, while the west door that goes upstairs is unlocked, north door is locked from the 1st floor, unlocked from the 2nd, so you can.. go downstairs from it, but not up. It is a bit odd. Sorry if my explanation is terrible.