Crappy guide > no guide.
I believe that a complete newcomer to Construct would be confused after reading first few paragraphs of the guide, they don't follow your thought process quite yet. Cover the basics first, then build on them.
Also, I think it would be greatly productive if examples were supplied; documented, basic example cap. Use colored balls - red, yellow, blue - and show how is picking done, the differences etc.
That would go a long way in my opinion! Kudos for the effort so far.