There is one typo in brush style typeface translation.
The word "萎縮" is pronounced as "Ishuku" not "Jishuku".
If writer want to "Jishuku", chinese character should be "自粛".
That page is broken.
The try.github.com will redirect to http://try.github.com/levels/1/challenges/1
but I got "We're sorry, but something went wrong. (500 Internal Server Error)"