I hesitate to offer a suggestion because I am still so inexperienced, but I personally would have liked it better if the fill light had not been so bright. It loses the night-shot effect for me.
a flash photo of a couple of leaves isnt going to cut it for this challenge. people were looking more for a shot where the nighttime is actually visible. for all we know this could be broad daylight (although it looks like nighttime with flash).
the direct lighting of the flash makes for a very cotrasty stagnant photo. The subject is nicely colored, but is the subject is not presented in a way that makes me think, or is anything other than what i would see if i looked at it for one second in real life. show me something i would miss if i wa walking by. The image also does not show any 'night' in it... it just happened to be dark when you shot the image.
I find the leaves turning from green to red somewhat interesting, but the overall photo doesn't sustain my interest. It feels too busy to me. Not sure of the light source, possibly your flash, but the lighting feels pretty harsh.