I recently downloaded and started using Locmai (can't find a version number). I'm an adult beginner and I've already waded through literally dozens of other courses, books, tutorials, etc. for beginners: none of them come anywhere close to Locmai! You clearly have the knack for explaining things in a manner that beginners can comprehend. Congratulations, and thanks!
My suggestion relates to the animated graphics that are so crucial to the effectivness of your course. I think it would help immensely if the user was given an option to "step through" a graphic, i.e., clicking something to trigger a single-frame advance (or reverse), rather than allowing the graphic to run its course automatically. The "something" could be an icon appearing at appropriate places in the text. As it is now, when the user is reading a line of text and trying to digest it, the blur of activity from the running animation makes this difficult.
You've got a real winner here, and I wish you continued success!
Frank
(Bahia, Brazil)