Meh. It was okay...
You could have definitely worked a bit more on the graphics. Some of the shadows looked too harsh and there were some other color mismatches, and don;t rely so much on the painbrush tool, since the results look sloppy. The animation could have been better, since the walking sequences looked kinda crappy and the van looked really bad when you attempted to do make it look 3D.
The voice acting was very good, although the script seemed unrealistically clean (who says the words "heck" or "darn" once they come close to being killed? I'd be a bit more obscene next time, just for the sake of realism). The woman also said some very cliche things like "a man who needs a gun is compensating for firepower elsewhere" (which I may add is a load of crap).
The scripting was okay. Maybe you should make some custom buttons next time to make it blend in better.
The storyline was great, and the options one could choose were reasonable.
Part two should be great. Overall, not too shabby.