Privacy Policy
Last updated 27 September 2026
Pre-launch preview. This page describes how the preview actually behaves today. It has not been reviewed by counsel, and the operating entity and game-service licence required by Decree 147/2024/NĐ-CP are not yet in place — so nothing here should be read as the final terms of a licensed Vietnamese game service.
The short version: we collect what a leaderboard and a legal playtime limit need, and nothing else. There is no advertising profile, no tracking across other sites, and no sale of anything to anyone.
What we hold, and why
If you sign in: your account identifier, and the email address or Google profile you signed in with. This is handled by Firebase Authentication, operated by Google. It is what lets a score be yours.
Whether you told us you are under 18. One flag. It exists to enforce the playtime limits Decree 147/2024/NĐ-CP requires, and for nothing else.
Your scores: the game, the score, when it was set, the display name shown beside it, and the run statistics a game reports. Scores are what a leaderboard is.
Your playtime: milliseconds played per game per Vietnam day. Required to enforce the limits above.
Run sessions: a server-issued identifier, a single-use nonce, and how long the run took. This is the anti-cheat check that stops a score being invented.
Advertising events, when ads are live: which placement, which game, which locale, and whether it was a test. These carry no account identifier, no IP address and no device identifier, and they are deleted automatically after a fixed retention period.
What we do not hold
We do not build an advertising profile of you, do not track you across other websites, and do not sell or rent personal data.
We do not ask for a real name, a date of birth, a phone number, an address, or a payment method. The site takes no payments.
Who else sees it
Google, as the operator of Firebase, which stores the data above and handles sign-in. Vercel, which serves the site. When advertising is switched on, Google AdSense serves the ads — the events we keep about them carry no identifier, as described above.
Your display name and score are public on the boards you appear on. Nothing else is.
How long
Scores and account records are kept while the account exists. A score set before signing in is held for 30 days so you can claim it, then deleted.
Playtime ledgers are kept per day and expire once they are no longer needed for the limit. Advertising events expire automatically.
Delete your account and the records above go with it, as described below.
Your data, on request
You can ask for a copy of everything held about you, and you can ask for it all to be deleted. Both are available from your account page once you are signed in, and both can be requested by writing to us.
Deletion removes your account, your scores, your board entries, your playtime ledgers and your saved progress. Your name disappears from every board. It cannot be undone.
Children
The playtime limits described in the Terms apply to every account recorded as a minor. Beyond the single under-18 flag, we hold nothing extra about a younger player and nothing that identifies them beyond what is listed above.
Contact
For privacy requests, takedown notices, or anything else about this preview, write to the address published in the repository's README. A named contact and postal address are published here before public launch.