Privacy
Your game progress
The games calculate results in your browser. Progress, achievements, records and your language choice are saved locally on your device until you delete this website’s browser data. We do not receive these game data. There are no player accounts, uploads or contact forms.
Hosting and statistics
Our hosting provider, OpenAI Ireland Ltd., processes technical access data such as IP address, page address and time to operate and secure this website. Its infrastructure may also process data outside Switzerland and the EEA. Details of recipients, countries and safeguards are in the data processing terms and provider list.
Our own statistics store only daily page-view totals for each page, for up to 180 days, without cookies, visitor identifiers or stored IP addresses. We do not use Google Analytics.
Cookies and advertising
The games themselves do not set cookies. We have integrated Google AdSense. Loading it can transmit technical data, such as IP and page addresses, to Google and its advertising partners, including in the United States. We do not transmit game inputs or results.
With the appropriate consent, Google and its partners use cookies for personalised ads based on previous website visits. The Google consent message identifies providers and purposes. You can change or withdraw your choice through Privacy settings, and disable personalised Google ads in My Ad Center. Where applicable, Google also provides a “Do not sell or share” link. See Google’s data use and privacy policy.
Sharing
Only when you choose to share or copy do we pass the selected result, challenge text and link to your device’s sharing function or clipboard. Challenge links include a random game seed, tempo and game version so others can replay the tasks. Result images are created locally and stay on your device until you share them. External research and image-credit websites have their own privacy rules.
Contact and your rights
The controller and contact details are in our legal notice. We and the email providers involved process your address and message to respond to enquiries. Our mailbox is provided by Infomaniak Network SA in Switzerland. We retain correspondence only as long as needed for that purpose or legal requirements.
Where the GDPR applies, operation, security and handling general enquiries rely on legitimate interests; advertising requiring consent relies on your consent. Subject to applicable law, you may request access, correction, deletion, restriction and portability, object to processing, and withdraw consent. You may complain to the competent supervisory authority, including the Swiss FDPIC.
Updated: 4 October 2026