The shooting isn't it to bad really, I see you implanted some elements from call of duty like the weapon aiming in two different modes. The effects of the bulletholes is oke and the fake physics you coded are oke but not more but with the newton engine it would even
look better
The level design is bad, not realistic at all but that's just a test level The weapons are good but need some improvement, the textures are mostly abit blurry.
But it's a nice effort, I would advice you to keep on updating it, no worries because almost all beginning projects look bad in the eye of the designer and the user ^^

Cheers

Frazzle