Meet the toolbar.
To explain a bit what you see in this masterpiece :) -
The idea is to try and keep the menu/toolbar area simple and flat, but still provide some sort of a visual clue that Go and Start are clickables.
Here are three options compared back to back to make the differences a bit more obvious -
Here are few options that were leading up to the above one:
iOS says Hi
Also, considered disposing off the menu bar and folding whatever few items it has into the drop-down menu. But this just looks weird and too alien on Windows, the app needs a menu bar.
Dropped the idea.