there's only a few things that I didn't like: the red blood-border should only show when you're hit, but then fade away again, and some other display should show how much health you've got left.

When you die and get spawned again, all your weapons should be reloaded at start.
Mousewheel should scroll through the weapons (that way I can go to the previous weapon too, atm, I think there's only "Y" for "next weapon", right?)

Those are just personal oppinion.

The game rocks, it was great fun! Especially when 5 or more people where online...