What a great system. It's a great idea for a fps game, and I was happy to see the demonstration of it.
The limb-modifying mechanic is one of the most creative mechanic I have seen so far. It seems like the current system handles it quite well. It is an amazing prototype, having so much potential for publishing. I know you currently have 2 projects in the works, but I would be happy to see more from this project if I could as well.
Great job!