Probably you have noticed that our plugin uses JQuery Superfish menu plugin.
You can find more information about it here http://users.tpg.com.au/j_birch/plugins/superfish/
As you can see there are many options for further customization of the menu.
That's why we made the razor view file open for modifications (rather than make it as an embedded view) and leave this to you to do whatever you want.
As long as you guys have the html and the css in your hands we bet we will see some very good menus very soon :)
Nop-Templates Support Team