You have done a very pleasant abstract for this Challenge.
I would suggest that, while the two very hot areas in this image are certainly in high contrast to the remainder of the image, they are probably not enough to influence voters to judge it high in this category.
You obviouly had fun with the abstract itself with good colors and just enough in focus to give a foundation. I'd suggest moving that focus point into one of the sweet spots (rule of 3rds) to keep the viewer in the picture to enjoy the color patterns.
It's always fun to experiment with a good lens. I"ll look forward to seeing more of your work.
There is some contrast in your photo, but for me, the bottom 2/3rds is very, very close in tonal value. I like your border and how the object is off-centered.
Nice colors and an attractive abstract. The white light on the left bothers me, though. Other than that, the elements here (including the frame) work nicely together.