im sorry but i think it looks sh.itty
but im not just gonna say its s.hit and leave, im gonna help u out.
I think that the ground needs to be smoother, and that yu should add more scenery than just rocks and trees
also, make the ground texture tile better, try and make it not have a black spot in the middle or anything, it looks too tiley and more like a 3ds max model than a real life map.
i like the signs, they look good.
to help it you should make some new vehicles and weapons to add to the map, and just remember when making new vehi's and weaps, its the fun or power you get out of the weapon or vehi that matters, not its skin or model. (although model helps

)
and another thing, its a box map... *shudder* not another boxey map...
you gotta fix those walls, or at leats think up a storyline that wuld suit the square walls (like i did)
otherwise, its ok, add the snow shader for the ground aswell, so it has the shiny bump map and stuff and the sound.
kep it up man, get it finehsed and release it, dont make 20+ maps like me and never release them, like me.
im hopeing my latest map will get released.
oh and P.S get rid of the random red and blue lasers through the map.