Hi Reiko! Great question and it's certainly something that is
coming.
What is the hold up? I am polishing the site and making all
existing sections contain enough features to make it enjoyable to
use. Also, I'm working on inviting more people to the site and
hopefully they will enjoy using it ^^;
Second, I just got done with the Jappleng Market system which
permits users to unlock stuff from participating around the site
and soon, the ability to purchase J-Coin stacks with real money in
support for the future development of the site.
Third, I'm now working on the achievements system, it's a bit
more complex than expected but in the end it should motivate people
to use the site more.
At this point once the achievements are complete, I believe it
would be a good time to focus once again on the education part of
the site. I will first begin with improving chapter 2 lessons,
adding a few new lessons and fixing some bugs. Thereafter I will
add flashcards and a flashcard game based on what you have saved.