Little Mayor is a game for children, so it collects as little as possible about them. Here is exactly what it stores, for how long and why.
In effect from 2 September 2026
The short version: the game has no sign-up, asks for no e-mail address and no name, and sets no cookies. The only thing that could be personal data is the nickname a child types into the daily leaderboard. That is why we ask, right next to the field, for a nickname rather than a real name. Nicknames are deleted after 30 days.
| Data | Why | How long |
|---|---|---|
| Game result | Map, task, difficulty, score, title earned, list of problems in the town, date and time, booth or class label. It lets a teacher see a summary of the lesson and lets us improve the game. | Indefinitely, these are anonymous numbers |
| Random browser id | So the same game is not recorded twice when a submission is retried. It is a random string generated in the browser and cannot identify who played. | With the game result |
| Leaderboard nickname | Text the child types voluntarily when they want to appear on the daily leaderboard, plus the score and time. Leave it blank and nothing is stored. | 30 days, then deleted automatically |
| Contact form enquiry | The name, e-mail address and message an adult types into the form on the Contact page or on the start page, plus the topic and an approximate number of children. Used only to reply. Children do not use this form; it is for teachers, organisers and towns. | 3 years from the last message, then deleted |
| Feedback | Stars and two free-text answers from the feedback page, plus an e-mail address only if you type one. Stars from the game and the web are added into an anonymous tally; the texts are read only by the author. Without an e-mail address it is entirely anonymous. | Texts 3 years, the star tally indefinitely |
| Counters | How many times someone started a game, finished a town, saved a diploma or opened a page of the site. Plain monthly numbers with nothing attached. When the game hits an error, the first line of the error message, the file name and the game version are stored, with nothing about the player or the device. | Indefinitely |
| Site analytics | Cloudflare Web Analytics: aggregate page views. It uses no cookies, does not follow visitors across sites and builds no profiles. | Per Cloudflare settings |
| Browser storage | Chosen language, the player's own statistics, booth label and a queue of games not yet uploaded. It stays on the tablet or phone. | Until browser data is cleared |
Where the risk is: the nickname field is free text. If a child types their full name and class into it, that becomes personal data and is shown to others on the daily leaderboard. That is why we ask for a nickname at the field, reject entries that look like a first and last name, and delete the whole leaderboard after 30 days. If something like that shows up anyway, write to us and we will remove it straight away.
This section is about children and everyone who plays the game. The contact form is a different matter: an adult fills it in about themselves, and it is described above.
Anonymous game results and counters are processed on the basis of our legitimate interest in running and improving the game. They are not personal data and cannot be traced to an individual child.
The leaderboard nickname is entered by the player, voluntarily, only if they want to appear on the daily leaderboard. Leaving it out does not affect the game.
Contact form data is processed so that we can answer your message, and where relevant to discuss working together. Filling the form in is voluntary; you can simply send an e-mail instead. We do not use these messages for newsletters and we pass them to nobody.
The data sits in a database operated by Cloudflare, which provides our hosting and storage. Cloudflare acts as a processor and accesses the data only to run the service.
Form enquiries and feedback texts are read only by the author of the game. They are not reachable from the web at any address, hidden or otherwise.
Game summaries and the leaderboard are seen by the booth staff or the teacher running the lesson. The daily leaderboard is public in the sense that it is displayed in the room where the game is played.
If a record concerns you or your child, you have the right to ask about it, have it corrected or deleted, have its processing restricted, and to object. Write to the contact address below and we will answer within two working days.
If we do not resolve it to your satisfaction, you can contact the Czech Office for Personal Data Protection, Pplk. Sochora 27, 170 00 Prague 7, uoou.gov.cz.
You can forward this section to your data protection officer:
If the way we process data changes, we will update this page and change the date at the top. A log of changes to the game itself is on the Changes page.