Looks really great, and I really like the concept. For a real game it would really use some nice background in the tavern and probably some more things that can be done like:
- partying multiple adventurers
- asking them to stay for some time
- weather? or actual global events like festivals, holidays, plague, etc
- quests that adventurers can take ( for example buy or get supplies for tavern)
Honestly this is very good and can be greatly expanded into something about tavern management. Does the game has an end currently?