I really love the conception behind this photo. It has an ephemeral look. I'm wishing the subject leaf stood out a little more. With a little different processing, and possibly cropping, this would be a standout!
This image has a lot of potential..the solitude of the leaf, the motion blur..all good characteristics. But I feel the processing and composition have let you down. A tighter crop, and more detail in your subject would've helped significantly!