Last updated: 2026-10-17. This page applies to the hosted version at foudreai.com. Playing offline sends no data to any server, and a self-hosted copy of the open-source game connects to no server at all. The following mainly concerns the optional online leaderboard.

1. Who is responsible

The controller is the independent developer of GRAVOFF (GitHub: weijt606). This is a personal, non-commercial fan project. See section 9 for contact.

2. Consent (GDPR)

• The online leaderboard is optional. Visitors from the EU, EEA, UK and Switzerland see a consent dialog on their first visit. Until you choose – and if you choose "Play offline only" – we store nothing about you on our servers; scores stay in your own browser.
• To decide whether to show the dialog, the server reads the country code Cloudflare derives from the connection. It is used for that single response and never logged.
• Legal basis: your consent for the online leaderboard (GDPR Art. 6(1)(a)); legitimate interest for abuse-prevention rate limiting (Art. 6(1)(f)). Withdraw consent at any time via "Privacy settings" at the bottom of the start screen and optionally delete your online data; withdrawal does not affect earlier processing.

3. What we store

• A hash of a random player ID so we can recognise you as the same player. The ID itself stays in your browser; the server keeps only its SHA-256 hash. The first 4 characters are shown as a tag on the leaderboard (e.g. Bob #A1F3) to tell players with the same nickname apart.
• Your nickname, if you choose one (nicknames may be shared by several players). Leave it blank to appear as "Guest·XXXX". Nicknames are automatically screened for profanity, impersonation of staff and ads.
• Scores: score, grade, the gameplay values used to compute them (touchdown speed, distance to target, airtime, tricks completed, …) and timestamps.

4. What we don't store

• No IP addresses, user agents, device data, email or accounts. No cookies, no cross-site tracking, no ads or third-party analytics.
• Abuse prevention: the server derives a one-way hash of your IP with a key that rotates daily and uses it as a 1-minute rate-limit counter. Counters are kept in memory at Cloudflare's edge and expire within minutes; only if that feature is unavailable are they written to the database, for at most one day, and they cannot be linked to you after the key rotates.

5. Retention

• Personal bests on the leaderboard: until you delete them; players with no scores are removed after 180 days of inactivity.
• Per-run records: deleted automatically after 90 days.

6. Your rights

• Erasure: click "Delete my data" in the leaderboard to erase your nickname, all scores and run records immediately (GDPR Art. 17).
• Rectification: change your nickname on the start screen at any time, or clear it to become anonymous (Art. 16).
• Access, restriction, portability, objection (Art. 15, 18, 20, 21): contact us as described in section 9 and include the nickname and 4-character tag shown on the leaderboard.
• Complaint: you have the right to lodge a complaint with your local data protection authority (Art. 77).
• Clearing your browser's site data removes the local ID; server data then can no longer be linked to you and expires as described above.

7. Processors and international transfers

• The game is hosted on Cloudflare (Workers, D1 database, edge network), acting as processor. The database is located in the European region, but requests may be handled across Cloudflare's global network; Cloudflare relies on safeguards such as the EU Standard Contractual Clauses for transfers outside the EU.
• AI commentary is currently disabled. If it is enabled in the future, only the gameplay values of a finished run (no nickname, ID or identifiers) will be sent to Anthropic (USA) to generate it, and this notice will be updated first.

8. Age

The game itself is suitable for all ages. The online leaderboard is intended for players aged 16+ (or your country's digital age of consent); younger players should turn it on only with a parent's consent, or choose "Play offline only". We do not knowingly collect children's personal data – contact us to have it removed.

Local storage (no cookies)

Key	Purpose	Written when	Basis
carfly.lang	The interface language you picked (if you never pick one, your browser language is used and nothing is stored)	When you click EN / 中文	Strictly necessary (your preference)
gravoff.consent	Your choice in the privacy dialog	When you choose	Strictly necessary (records consent)
carfly.v3.best.*	Best scores on this device only, never uploaded	After a run	Strictly necessary (the game feature you use)
carfly.v3.player	Random leaderboard ID, nickname and tag	After you turn on the online leaderboard	Your consent (asked first in the EU/EEA/UK/CH)

Neither this site nor Cloudflare sets any cookies. Clear this site's data in your browser at any time to remove all of the above.

Terms of use

• Free and as is. The game and online leaderboard are free and may be changed, interrupted, reset or discontinued at any time.
• Play fair. No scripts, cheats, automation, forged requests or other score manipulation, and no attacks on or abuse of the server API. Offending scores and nicknames may be removed without notice.
• Nicknames. No insulting, discriminatory, sexual, illegal or infringing nicknames, no impersonation of others or staff, and no ads. We may edit, hide or remove inappropriate nicknames and their scores.
• Intellectual property. The code is open source under the MIT licence (see the GitHub repository); the graphics, music and text are original to this project and also MIT-licensed.
• Changes. Updates to these terms are dated on this page; continuing to use online features after an update means you accept the new terms.

Disclaimer

• Unofficial fan project. GRAVOFF is an independent, non-commercial game inspired by a public sports-car launch demo. It is not affiliated with, authorised, sponsored or endorsed by any car, aerospace or technology company. Any company, product or trademark mentioned belongs to its respective owner and is referenced only to describe the inspiration.
• Fiction. The vehicles, venues, "suction fans", "cold-gas thrusters" and physics are fictional, simplified simulations and do not represent the performance, features or safety of any real product. Do not attempt any driving or flying shown in the game in real life.
• Commentary is for fun. Result commentary (including any AI-generated text) only teases your in-game performance. It does not target any real person, company or group, does not represent anyone's views, and may be inaccurate.
• Player content. Leaderboard nicknames are chosen by players. Obviously inappropriate nicknames are filtered automatically, but the author is not responsible for nicknames; report offensive or infringing names as described in section 9 to have them removed.
• Original music. The background music is original to this game and synthesised in code; no third-party audio is used.
• Limitation of liability. To the maximum extent permitted by applicable law, the author is not liable for any direct or indirect loss arising from the use of, or inability to use, the game; liability that cannot be excluded by law is unaffected.

9. Contact

Feedback, removal of inappropriate nicknames, data-subject requests: GitHub Issues (for personal-data requests, don't post your ID publicly – the nickname and 4-character tag are enough).