Excellent, but not perfect.
This game was really well done! A great variety of weapons, good graphics, good defence...only one problem.
I come with the popular complaint of difficulty. I don't mind difficult games, but the problem with this one is that if you fuck up a little bit on the early levels, than you spend the rest of the game trying to make up for it. If the barrier health gets down too much early on, you spend all the daylight repairing it and never get anywhere. I mean, this was REALLY freaking hard. They always reach the barrier and you have to be insaneely fast. It needs a difficulty setting, really.
But overall, mad props. Just a bit hard.