Wow. Easy to waste away a few hours! I am currently on level 16. Enjoying the fact that they included a JavaScript array in this one 🙂
This is a puzzle meant to challenge you. It is meant for software developers. Not every question is software related. This will test both the geek and the nerd in you.
http://toughestdeveloperpuzzleever.com/tdpe2/
UPDATE: On level 27 now!