These are what I call "kindergarten hacking challenges", except for a small number of challenges you actually don't require to have more knowledge of web applications than the average internet user.
I deliberately made these challenges when the original hacking challenges site was about completing challenges or get banned automatically(do or die concept) that really didn't work well so stepped away from that concept.

The first 10 challenges can be completed within just a couple of minutes if you have more than average knowledge of web security and logical thinking of how web applications respond.