I enjoyed the idea and its a nice way to spend a bit of time. The art and music is atmospheric, but once you figure out the pattern and become used to the quests, the game becomes super easy. It might be useful to add more encounters/quests and some additional challenges. I even forgot about the existence of the crystal ball, so needless to say it was a bit too easy. I am not sure what function the star system serves, so maybe having some sort of punishment for low ratings would work well. The writing is witty and enjoyable, so putting a bit more emphasis on it would help the game but don't "overwrite" either - people are lazy and don't like to read long chunks of text, but in this case, a bit more writing/descriptions (like a sentence) wouldn't hurt the game.
I would say adding more purchasable items would be good too, to decorate or even provide functional benefits to the tavern and the barkeeper. It's mostly an idea, but being able to build relationships with certain races/groups/guilds I think would be pretty cool and give your game more depth.