Try the Backdrop challenge!

I have developed a fun challenge/puzzle to help celebrate Backdrop's 5th birthday. It's a Backdrop site where your goal is to delete all the spam. Try the challenge here:

https://panda.id.au/backdrop-challenge

I also wrote a blog post with a bit more information about the inspiration, technical details, etc.: https://panda.id.au/posts/introducing-the-first-backdrop-challenge

Enjoy!