I think it shows a lot of guts and comitmment to do what you've done...Some of the framing is quite nice....I know this from experince...Take Kithunters crits for what they are, helpful critique I handed him a pup of a trailer a long time ago and he steered me right.
Locations are what you make of them, I've filmed in some terrible places but you can add shape and form to some mundane places with just a little bit of creative lighting.
The less yous ee of the aline the better...remember the original film, the tension was built up becasue you DIDN'T see much of the creature util the last act.
As Kit says vary your angles, if you have access to more than one camera get them placed and running as this will save having to do the same take over and over. Vary the height and you can get some good approximations of dolly shots by simply using your tripod. http://eugenia.gnomefiles.org/2008/05/02/c...th-your-tripod/
Take a look there that should help...I've done some work on shoots where a good few grand has been spent on expensive dollies and cranes, and the shots didn't look as good as those at the link.
Dictate the pace of your film with the editing, fast, or jump cutting tneds to jar so try and avoid it unless that is the effect you're after....One thing I'd do when you think you've got the film editied to your liking, pass it around to people not involved in the project and see what critique you get there...people closely involved with the project have a clouded sense of judgement and understandably so. A lot of my work I pass to a few select people I can trust 1: to be completely honest, if it sucks then you need to know. 2. That you can trust them not to pass it around on the web. the last thing you need is something you've worked long and hard on being shown in it's rawest form.
As I said kudos for getting up and doing something most only dream of doing.