Not an animation
Despite the fact that I DO see the funny side of this, to a point, Tom says our subs should have animation in them and this doesn't. I would therefore advise you to animate it.
Apart from that, there is technically nothing wrong with it. Unlike most tiny little submissions, this one has a point implicit in it- It was about being nothing but one letter. It was about being a spammer and getting support from people by making them laugh.
The point of visiting here and exploring is not, to me, looking at a letter B, but exploring the reviews- it is indeed a piece of portal history and a monument to, amongst other things statwhores.