I made this web riddle somewhere around 2009-10. Inspired by similar web riddles like notpron and zest, the game is a collection of numbered ‘levels’ which are no more than very simplistic web pages. The aim of the game is simply to get from one level to the next by any means necessary. The only tool needed to play the game is a browser.
This project for me was and still is a personal exercise in level design and fair puzzle construction. There are roughly 30 levels at time of writing. The difficulty curve of these levels is under constant adjustment based on playtesting, feedback and so on.