I don’t understand what benefit the interactive prompts give. It’s mostly just applying basic logic, while all of the new information is provided in the text prompts. I think this post would have been better if it was formatted as a (free) blog post. There are too many other free sources for learning (KhanAcademy, OpenCourseWare, etc.) for a competing short tutorial on a basic concept to be purchased by a large audience.
The title caught me, but I got one click in and realized I hadn’t actually read the first paragraph.
I clicked a second time and got distracted by where the noise that suddenly appeared came from.
Then I got distracted by a bunch of emoji’s, didn’t read the words, then closed the tab.