Allright my opnion.
It looks kinda cool, but nothing like bioshock. Oh well it's a fangame, but if you are searching for bioshock feeling to it, i reccomend to plan little bit of different colourworld (if you know what i mean).
Bioshock's world looks cold, and every corner is full of various scrap and such.
You could start by making some fog maybe? Different room textures, the stock ones are kind of boring, and dont have much life on them.
The green light also is pretty annoying, but that may be just me.
Otherwise this feel's like a good game.
Your signature has been erased by a mod please reduce it to 600 x 120.