great concept! good use of dof. would have liked to seen other compositions however, as the centered tower, cropped base, and direction of the lines could be improved.
Not sure what others think, but I would have liked to have seen this with a portrait layout. I think that might have given you a slightly nicer composition. I'm finding the centre placement of the "A" tile a little static. The Shallow DOF is done very well. We get a good sense of the "origin" of the tile and the lose of focus on the tower shows that you aren't just going for a blurred background.
5 - Like the concept. Criticism; if the 'A' were sharper, and perhaps a slightly different angle, to allow the 'pile of tiles' to be seen better (even though it may have reduced the shallow effect), may have made this better in my opinion.