A few suggestions.

The farming should take a bit longer for each crops you plant and should take certain cycles to grow, i.e., grapes should take 4 in-game days, corn maybe 5 in-game days, etc.

The merchant should sell armors and more weapons for our protection and each enemies should scale to the level of the weapons and armors we use, is possible.

There should be weather forecasts, like rain, storms, cloudy, and they should integrate with customers, for example, if it rains, some customers might want to order soup or just plain ale because it suits them in that time.

There should be cabinets for decorations and/or putting dishes in it.

The tavern itself should have been unlockable through means of building it yourself; i.e., chop trees for wood and used for planks, mine boulders for stones, etc. It would also be good if you can choose which room you would like to build first.

The changing of days should be for every 30 minutes in real time would be 1hr in-game.