Great work. Your 'in use' examples are effective in pulling your work together and make it easier to understand intended use - I have been inspired by that. If I have time I'll borrow that presentation method.
No worries! Re. the rules someone pointed them out to me a week in and I said 'dope' (Homer Simpson style). That said - I found this surprisingly fun to do so no great loss. But yes, thanks for the note - the icons could be more to the point and direct.