[derReineke]

So far what I gathered from the comments:

* Not the most secure * A fork of code wars. * Has random photos for testimonials. * W3schools links. *How is it like Duolingo at all?

[MetalGuru]

Seriously. Yet it's at the top of HN with 150 upvotes. OP posted this twice already and it got 5 and 6 upvotes. Either HN readers are becoming less discerning or this guy gamed upvotes. Judging by the fact that the testimonials feels dishonest, I wouldn't discount the latter.