First off I'd like to say I really enjoyed this and I think you've done an excellent job, very inspirational, and I wish I could have pulled off something this good myself. You should be very proud of what you've created. I also liked the Dresden Files nod, love the books and I even liked the show.
In the spirit of constructive criticism (as requested) I would like to offer some thoughts I had during the viewing.
In the opening sequence, the foley sounds seemed a little too loud, they made my brain think "ooh, foley" instead of just accepting them. A bit quieter and I wouldn't have even registered it.
I think you could do better on the alien mask. I actually really like the concept you have for it, it's a very cool look, it just needs a little better execution. If you can find the time, I would look into reworking that effect, getting help if you have to, I'm sure someone would be interested to help.
The mask also shows "ripples" around the outline making it clear it's a piece of cloth in some scenes, I think it would be worth the effort to just roto or clean those up somehow, it's only a few seconds here and there.
Once again, excellent work, I very much enjoyed it, and now I really really want to watch that ridiculous 80's movie again....