There is nothing that appeals to me in this photo. The subject is too small to even look at, and the surrounding elements definately do not add to the photo. What is that? a Tripod?
It doesn't even look like there is a real rubber duck in the photo.
By your description, it doesn't seem like you entered this seriously but rather as a joke, which makes it really hard to spend my time creating a serious critique for it. But I'm trying.
The lighting is aweful. The 'duck' is quite bright, it creates numerous shadows that don't add to the photo at all. There's a huge bright white spot on the plate from reflection of the light.
Focus is soft. My suggestion, and you already know this, is to get in on your subject. Even then, I'm not sure the subject matter is interesting/exciting enough to grab my attention.
I don't mean to sound harsh, but hope this helps to understand such a low ranking. ~Heather~