I like your design - lovely!
...and I concur with the cloud but only because of the rendering which is quite different from the rest of the picture. I like the idea of the tea house resting ontop of a cloud and think that if you rendered it in precisely the same style as the rest - it would work quite well.
Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. (Mark Twain)