next time try cropping it so His back is a little chopped off, and on the other side you can see the walking stick more. I think, someone correct me if I'm wrong, but when you take a "portrait" of someone looking away, you want them to be looking more "into" the picture, not right to the edge of it.
Weird, usually from the sunlight shining thorough you get beautiful amber tones of light coming through stained glass. its odd to me how youve gotten true white through it. makes it look fake. would be much better with truer colors.
The challenge is about "creatively" shooting glass, not just shooting "creative glass"... I'm sorry, I don't mean to sound rude. In any event, as lovely as this stained glass window is, the exposure is still not quite right.... :( Nice try though...