WOW
One simple word describes this game, wow, You did an amazing job, the story was involving and everything was superb, I honestly suggest if you're able to write this good a storyline to start writing some novels.
But jeeze, this is definately going in the favorites. But there is one little thing that maybe you could fix, it's that generally i never got hurt because of how the enemies couldn't shoot through the boxes, so i'd just jump and shoot. If somehow you could make it so they can jump as well, it'd make the game all the better, oh and possibly if you could fix the response time on the weapons, you see i'd go to shoot but it'd take about 5/10 of a second afterward to fire the round.
Can't wait to see whats next, bon chance.