Way too busy, complete visual chaos.
Have you HDRed this? This image desperately needs some deep shadows to bury some of the confusion.
It's a nice stairwell, though. This photograph is almost irresistible, one cannot NOT take a picture either up or down a stairwell, and they're mostly crap because the stairwell ain't all that. This is a pretty good stairwell, though. I like the various angles here, it gives is a very Escheresque feel, which is enhanced by the pencil-sketch feel of it. I don't know if you obliterated the light with HDR, or if the thing is just very very evenly lit throughout, but you've definitely nailed a pencil-drawing-no-directional-light feel.
I approve of the look, I approve of the subject. This one's just too damn much!
Maybe if it were printed huge?