I won't make comment on the genre or theme of this story, other than that it isn't my bag. What I will say is that the grammatical inconsistencies and (in some places) shifting of tense, make it clumsy to read. Some of the run-on sentences really bothered me (ie. He had entered that strange and foggy world, that one where violence and senseless is the only answer, and everything else is futile and tiresome, making no difference at all; he is now a segregated from other people, even his teammates; no one will be able to understand him, just like no one understand Sniper inside that dreamy land.) Some of the dialogue between Sniper and Spy seemed not-quite in character, although it could just be that you didn't write their accents- in a way, it's just a matter of personal taste. I would suggest if you want this story to really be polished, find a few beta readers and see what they make of it. An editor, even. Just spellchecking something won't help with clumsy choices of words or syntax. Eh, hope that didn't seem too rude to you. I'm just offering my own opinion on the technical side of this story writing stuff.