It took me a few seconds to figure out what this is but I got it :-) The perspective is great. What a pity the flag was in shadow or else the colors would really have come out well.
This shot looks like it's trying to be avant-garde, but it's not really *about* anything and it's lit really weird so it doesn't end up achieving anything, really, IMHO. It's got diagonal composition, which can be good, but in this case looks like it was thrown in 'to make it more interesting.' That really only works when what you're photographing has a little interest of its own. Also, given that the flag is lit far darker than anything else in the frame, it almost looks like it's fallen down a little itself-shaped hole, a very odd effect (and probably not intended).
i think this is an interesting composition... I'm not sure why you chose to have the flag in the shadows though... It seems like the colors would be much more dominant with some more light...