I wouldn't have made the perspective from this odd angle. I'd have done it straight, or went right for the corner to corner. To each his own though. The colors are pretty bland. I bet a sunnier day would've helped you out. Not bad, but it needs something.
I thought about this same perspecitive, only using a fence and making the bottom verticle. Yours is much better. :) A little too much red in the toning I think however.
Too bad it's tilted like this. I know you probably intended it this way, but it would have been interesting by itself without the tilt. Also, you could adjust the contrast of the image - the shadow areas are a bit washed out.