Oh hi, author here! I tend to agree on `hangIf3`. I have a habit of mixing in other kinds of puzzles. Sometimes they're fun, but sometimes they're irrelevant to the main point ... I'll rethink this one.
p.s. thanks for the compliments on the format! If you (or anyone else) wants to create tutorials in this format, https://tigyog.app/ is a full platform for that! WYSIWYG editor and all :-)