You can't
move the menu bar to your application top. This is a conception designdesigned function from the original desktop metaphor. This is providing both an ergonomic (it's faster to move to a fix location) and a security function (this area is protected, and thus can never get hidden).
You can
move your keyboard to the menu bar:
ctrl ^+F2
and from there access any menu entry without touching the trackpad and faster than any mouse addict.