I have a 15.4" MacBook Pro, so it's not the smallest laptop, but also not the biggest. Nonetheless, the last two menu items (⚡ and my account) are not visible unless I zoom out with my browser (making everything smaller). It took me a while to realize that's why I couldn't find how to buy credits.

I suggest reducing the font size in the nav, and also switching to title case to reduce the width of each menu item.