Very nice! Love the movement in this. Definitely "meets challenge" in my opinion and given the score, seems to have met the challenge in most voters' opinions, too. Change anything? Maybe crop down to where you have just mushroom and no background/space, but works the way you have it cropped, too.
Good shot here. The lighting is nice and the subject is interesting. The green on the outer edge of the mushroom is a bit odd - desating the green channel may have cleared that up. And the pic could be sharper as well, but this is still a nice shot that scored pretty good. Cant complain about top 50 out of 200. I didnt vote in this one but I would have probably given 6-7 depending on my mood at the time.
Very nice lines and a fun to look at image. I wish the top extruding piece could be in focus as well, but I'm sure it's tough to get DOF all the way thru the image from the distance you were positioned from the subject. Good luck in the challenge.