There were 300+ fantastically diverse entries in this round, as is evident from the images below, making the judging pretty difficult. Simple elegance and subtle design flair had to be balanced against technical dexterity and design complexity. In the end, this design came out on top.
It is layered, complex and full of entertaining little details, but without becoming too cluttered. This might look easy to achieve, but can be a very demanding art to master. More than anything else, however, it was the successful communication of the feel and style of this round's theme and style that finally won the judges over.