Wow it took me a second to see what this was, great angle and lighting along with the beautiful pattern. I also really like the bright color of the tile (nice location!)
Had to look at this a few moments to figure out what the perspective was. I might have done a little perspective correction on the left side, just to square it up. I think that would bump up the impact a notch.
Fantastic improvement from the fence challenge. That one was very good for such a creative use of the shaddows, but this is is far more interesting compositionally and the angle you chose eliminated distracting elements very effectively. I'll be disapointed if this doesn't do well. Good luck.
This is a nice abstract, and a bit of an optical illusion. I may have cropped the shape in the upper left corner, but otherwise I like all the lines and shadows that fight for attention in this picture.
This is awesome how you displayed the shadow in this. Even though you cant really tell what it is, it looks nice. It almost looks as if its saying ho ho ho