Good subject choice. However, since camera light meters expect subjects that average to neutral grey, making things look white requires intervention to override what the meter thinks. This image could result from use of one of the automated modes without the corrective intervention. Exposure compensation or manual mode with brighter exposure would have helped.
Light on white, white on light? Is there a difference?
I don't know, I think the concept was great, the execution does leave something to be desired though, not just because it's gray (that's no biggie for me), but because it seem to lack detail.
Bonus points for a level horizon though. Think I'll give this a 6