Google Foobar code challenges

anyone else here done this challenge? I just finished level 5 and it's saying I'm done there are no more challenges.

>>6
+1

>>3
In other words, they're selecting those who wouldn't sensibly think "WTF? Did my machine/browser just get pwned?" if something like that happened to them.

Then again, if on the very slim chance that I had JS enabled and it happened to me, I'd probably get the page source and reverse-engineer/crack it... I wouldn't be surprised if everything was client-side, including those "tests" and their results.