Quoting Space Gypsy .
Pretty good work. The shape is well done and accurate and you have used tiles well. My only suggestion though is to improve the bridges. I'm not sure how you would do taht in such a small scale but keep trying.
Also, try using larger images. Are you using the simple uploader?
No, I'm using the Javascript uploader. But I found out what I was doing wrong and all my creations from now on will have enlarged photos.