|Greetings from the Critique Club!
Hits: This is a good night shot; the subject is well exposed (and not overexposed as often happens). The texture of the tree shows very well, and the colors seem right. It's good you chose an off center composition for this.
Misses: The key interest in the photo is the network of branches at the top of the tree. As mentioned, the textures work well, and there's a nice "branching out" feeling. However, aesthetically, it seems to end too abruptly. I think it would work better if you could have gotten more of the branch area of the tree and include a little less of the trunk (assuming your flash would cover it). Perhaps a vertical format would help.
Ideas: One thing you could have tried which I think would have made this really a "stop and analyze" type of photo is a little trick, but legal. What if you were to flip this upside down? I think it would look pretty cool, and there's no rule against it. Maybe next time!