The following comments are meant to be helpful. I realize that they may sound harsh and even bruise your ego, this is not my intent. Please accept my apology in advance if I sound too much like Simon Cowell.
The possums face is not in focus. It seems only the rear 1/3 of his body has crisp focus. However, I understand that there was very little light to help you focus. I doubt I could get as much in focus as you did. It looks as if this was a very tough shot to get; perhaps you were on your belly to get this great perspective.
Your post processing could be neater. You should not burn (make darker) areas of a photo without a selection. If you had a selection around his eyes, nose and widows peak, your attempts at burning wouldn't be so apparent. The post processing of photos is analogous to a woman applying make up. Both look excellent when you can't tell either has been used.
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poor little night vision fella.. with the big light in his eye. lol. I'm just learning but the face seems a tad over exposed.. still a great shot though :)
Very funny expression on the 'possum. It looks a bit blown out around his face and perhaps less sharp than could be desired. Not an easy capture at this light level, I imagine.