Composition : While a few folks seem to think the composition was "too centered", I disagree. While it is centered from right to left, it is offset very nicely from top to bottom. I feel the light is a benefit of the rule of thirds (loosely but effectively applied). To my eye the composition was one of the best aspects. But then again, what do I know :)
Exposure / Lighting : There is nothing specifically wrong with the lighting (that I can see), but the indirect light left the red a little on the flat side. This may have been intentional to better bring out the PhotoShopped "fire within".
Focus : No issues here. Everything is clear and crisp.
Post Processing : I envy your talent with post processing. I wouldn't be able to do this to save my life. I hope you write a "How'd they do that?" article showing how this was done.
Challenge / Wow : The challenge is certainly meet here. I felt it had Wow, but several others seem to disagree. I wish I could tell you why they weren't moved, but I can't.
Nice, subtle idea. The photo as a whole isn't very interesting though. With plain, centred composition the subject needs to be a bit more appealing... bright colours or interesting textures etc. The "fire alone isn't enough for me to like this photo.
The composition here is static to me, because the shot is straight on, and it is so centered. However, I think it is an awesome idea. I'm not crazy about wild things in post processing, but yours is one that I feel has been done very well. It enhances the photo, without being overbearing. Good work.
Excellent take on the challenge and very creative. One point off for shooting straight at the object, even a slight angle would be more creative. Good Luck, John Gill