I liked it overall. The build was nice, although you could see outside of the boundaries in some shots which was a mistake. The players did a good job, and I liked the lack of voices for once. IT was edited mostly well. There wasn't much of a story, not one that I could understand anyway. Luckily I was kept curious by what was going on.
Camera angles needed more variation. The zoomed out wide views were good for the beginning, but as it got into more detailed fighting it just put a wet blanket on the action and slowed the whole thing down.
The lag message and the guy going "uhh" was really annoying. Takes you out of the movie entirely. You also had items visible in that one scene where you were firing with first person, I bet you werent' sure what to do there. I recommend next time you use the GUI hiding mod, it works on a keybind and hides every aspect of the GUI.
The guy driving the car at 2:40 did a bad job, as an exception to the rest. Was it supposed to be an accidental crash? Was the driver really just supposed to pull up to the house? It was a little odd to say the least.
The one bad aspect, and I mean bad, was the ending. It was ridiculously terrible. Since the story was confusing (I'm not even sure there was one) your best bet would have been to end on a shot of that guy being killed or the group of 3 driving away. Maybe some kind of pan out? Instead you just had your actors bounce around like idiots on the roof with "the end" on screen-- frankly it ruined the sense of quality.
You have a patchwork of good ideas and editing, and some not-so-good decisions.
For a first movie? Bravo. In general not a bad job.