Liking the idea, too bad it's simply an awful experience with all the HN traffic. I hit "Sign up with Facebook", then "Edit what CodeFights can see", and the co

Liking the idea, too bad it's simply an awful experience with all the HN traffic. I hit "Sign up with Facebook", then "Edit what CodeFights can see", and the counter had already begun. After authenticating I got an empty pop-up which I closed by myself, and I finished the challenge. I then got the error "Authentication error". However, I like the idea and understand that this experience is not what you've made so I'll give it a chance and upvoted it.