Updated 15 September 2026. Applies to the Android games Jellivolt, Luma: Arrows (Люма: Стрелки) and Triolika (Триолика: плитки по три), including their Google Play and RuStore versions.
Who is responsible
These games are published on Google Play under the name Blank Comet. Contact: undefined.spb@gmail.com. Publisher details are also available in each game's store listing.
Game data on your device
Progress, records, levels, boosters, settings and advertising choices are saved locally. We do not provide player accounts, cloud saves, server-side game analytics or result sharing. Android backup is disabled. You can play the puzzles offline; advertising and external links require an internet connection.
You can erase progress in the game's settings. Clear the app's storage in Android to remove all local game data, including settings and advertising choices.
Advertising and your choice
The games integrate Yandex Mobile Ads. Before the first ad request, the game asks for your advertising data choice. Personalized ad selection and location tracking are disabled. If you decline, the game makes no new ad requests. You can keep playing, but video rewards are unavailable. You can change or withdraw permission in the game's settings at any time.
Rewarded videos start only when you choose to watch one. A reward is granted after confirmation by the advertising SDK. In Jellivolt, it lets you continue a lost Classic run with a pulse. In Luma, it grants a hint or restores lives. In Triolika, it grants a booster or returns tiles from the full tray to the board. Interstitial ads may appear at breaks between completed runs, stages or levels. In Triolika, after eight minutes of active play during a long level, a completed match may lead to a separate ad-break offer. You can postpone it, and it is offered at most once per attempt. Your progress stays saved. If no ad is available, it does not block ordinary progression.
The advertising SDK and its advertising partners may process device and advertising identifiers, IP addresses, technical device and network information, diagnostics and ad interactions to deliver and measure ads and prevent abuse. Approximate location may be inferred from your IP address. The games do not request precise location permission. Ad-related data is transmitted using HTTPS/TLS.
Yandex's processing terms, recipients, retention practices and international transfers are described in the Yandex privacy policy. We do not keep copies of the SDK's advertising records. Test builds use demonstration advertisements and do not generate advertising income.
Your privacy rights
Withdrawing permission stops new ad requests and discards prepared ads. It does not erase information the advertising network already received. You can reset or delete your advertising identifier through Android settings.
Depending on where you live, you may have rights to access, correct, erase or obtain a copy of your data, object to processing, restrict processing, withdraw consent or complain to your local data protection authority. Email us using the contact above for assistance. For information held by Yandex, you can also use the privacy request channels linked from its policy. We do not have player accounts or a central database of your game progress.
Support messages and this website
If you contact support, we use your email address and message to respond to and resolve the enquiry. Support correspondence is retained as needed to handle the request and any related follow-up or applicable obligations; you can ask us to delete it.
These pages have no cookies or analytics scripts. The web server and reverse proxy may process your IP address and technical request information to deliver the pages, diagnose problems and protect the service.
Audience
The games are intended for teenagers aged 13 and above and adults, and are not specifically directed at children under 13. A store's content rating describes the suitability of the game's content and may differ from its intended audience. If consent from a parent or guardian is required under local rules, it must be obtained before allowing advertising data processing. The game remains playable if advertising is declined. Contact us if you believe a child has provided personal information improperly.
Changes
The latest policy and its date are published here. If the terms of the advertising choice change materially, the app will ask again. The Russian version is available on the same website.
Delete your data
This applies to Jellivolt, Luma: Arrows and Triolika by Blank Comet. No player account is needed.
- To delete local progress and settings, open Android Settings, select the game under Apps, then Storage and Clear data. This is permanent; we cannot recover a local save.
- For support correspondence or help with a privacy request, email undefined.spb@gmail.com with the subject “Delete my game data”. Include the game name and describe which information you want deleted. If asking about earlier support messages, write from the same email address. Do not send passwords or identity documents.
- Advertising records are held by Yandex, not in a player database controlled by us. Use the privacy request channels in the Yandex privacy policy, or email us for help finding the relevant channel. Revoking ad permission or resetting an advertising ID does not itself delete records already received by the network.
Local game data stays on your device until you clear it or uninstall. Support messages are retained only as needed to handle enquiries and applicable obligations; a deletion request covers your email address and correspondence, except records that must be retained under applicable requirements. We will explain any such exception in our response. Yandex determines retention and deletion of its advertising records under its policy. There is no automatic 90-day deletion promise.
Support
For game support or privacy enquiries, email undefined.spb@gmail.com.
Please include the game name, Android version and a description of the problem. Do not send passwords, payment details or identity documents.
Progress is stored on your device. Uninstalling the game or clearing its app data deletes the save. Cloud recovery is not available.