I loved that puzzle site. I don't think I have ever been as hooked by programming as when I worked on those puzzles. Managed to get thrown out after completing level 5 by requesting another puzzle and forgetting about it. I even sent a support ticket begging to be let in again. If someone at the team sees this, I'd appreciate it :)

The last level for me was to write a function that evaluated

  sum([floor(i*sqrt(2)) for i in range(1,n+1)])

for 0 < n < 10**100. It was the first time I ever had use for my Knuth books.

It was quite detrimental to work performance though. Never heard from a recruiter, but I guess they don't employ developers in Norway.

I got the website three months ago, I just did the first puzzle and then stopped because I had to make way too many exercises for the classes I was taking and never entered the second challenge in.

The team behind it still exists.