what is a webriddle?
i have no clue if there is a standard name for them, but there's a lot of websites out there that call themselves ridddles, or puzzles, and you progress through the levels by guessing the next page's link through the hints given on the current level's page, often through the source code or hints that need you to google the answers for, and often cyphers too. I think they are neat, and I wanted to make one based around madoka magica facts! this will be easier the more madoka magica knowledge you have, but you might be able to get by on google. I may've not explained well, so check out these other riddles too:
polychromasia
awthapokoi