I loved the new additions you girls and guys have made to the 'Original Tree'! Have just got the Owl again. Very enjoyable course indeed! A nice one was 'Help, I am being eaten'.
Yes. That is definitely a Duolingo Classic. Here is another one from the new tree:
Congratulations on recapturing the owl! :)
In response to the angry rants in this thread: Your use of "girls and guys" is perfectly fine, and does not even deserve a reaction, let alone an overreaction.
I am a monolingual native English speaker, and using "guys" to refer to a group of mixed sex is still noticeably awkward. We only do it because we lack a plural "you" form. Since women tend to be passive about being called "guys", and men tend to be squeamish about being called "girls", we choose the path of least resistance and use the term "guys".
Edit: Looks like all of the ranting posts were censored. So my post looks mighty out-of-place now.