I love it! First of all, I love the fact that the inn opens up to the sea. Inside the inn, every room is very detailed, however I feel the top room (connected to the ground floor through rope) should server as a bedroom, rather than a sitting area, because an inn wouldn't be an inn without one or two bedrooms to accommodate customers. I also feel like the palm trees don't belong on top of the lighthouse. The columns surrounding it, I like it, it gives off an ancient feel to the whole thing. You could try adding a stairwell inside the lighthouse, for access to the rooftop.
Overall, it's a great build, but I'd say there's always room for improvement.