Really nicely done plugin! I am just implementing it in my site now and it has nice functionality.
As a front-end developer I want to manipulate the css, but is see multiple hard added width styles in the html and !important styles in the css. This last one is not necessary and would me a great optimalisation.
Furthermore it would me nice if you could choose your own width and height in stead of 2 fixed ones.
Keep up the good work!!