Udexia is a game/book made of 53 puzzles, tied together by a theme around magic and a handful of narrative drawings. Each puzzle leads to a word or a number that you can validate on a webpage. You then receive a "key" (a word, a number or sometimes an image). The webpage for a given puzzle can be easily accessed by scanning a QR code on the book, an efficient way to keep the gameplay experience mobile and casual. While some puzzles require keys from previous puzzles, most are independent in the first part of the game - in order to avoid frustrating new players. When you have figured out how to solve a puzzle, it only takes a handful of seconds or minutes to "execute" what needs to be done. —description from the designer