'Guide': each section has many subsections. When browsing through, it's easy to become disoriented due to the 'sameness'. Numbered titles/subtitles would be easier to navigate. Syntax coloring would add life to the monotones.
'Tutorial': the dark background and proportional typeface is out of character with some of the other code examples. (I happen to prefer mono-spaced code, with syntax coloring.) Examples:
