Fairly good, but needs a bit of work
I'm sorry, but despite the enormous potential you guys had, the game did not fly with me. As a big fan of tower defense games, I find that having to scroll through the entire battlefield constantly to be a bit of a peeve.
The graphics were indisputably well-rendered, but were spoiled by using human actors. Mixed media does not bode well in flash. I would have at least traced the people with photoshop or illustrator first.
In addition, wrapping a tedious storyline around the game, even though there is the option to skip through it, really puts a roadblock in the enjoyability of it. Also, if you wish to tie in a text-based plot, you should make sure that there are no spelling or grammatical errors. I see one right in the title! The poor syntax deferrs the hard work you have obviously put into this flash game.
It may have been just me, but the enemies were overpowered. I hated the fact that I had to repair my turrets, which drained more of the fun from the game. I wasn't too nettled about the playability, so I won't whine about it any more.
In short, good effort, but you shot yourself in the foot, using spelling mistakes and a high learning curve as ammo.