Support

Lumen supports Android 8.0 (API 26) and newer. The game itself is offline-first. Google Play is used only to check for and deliver optional app updates.

Progress, best scores, arrangements, compositions, prisms and settings are stored locally. There is no Caulderon account or cloud save. Clearing App storage or uninstalling removes this data, and we cannot restore it from a server.

A vessel freezes time automatically when it first charges. Select the glowing vessel, choose Release vessel, then resume. You can also use Freeze/Resume and the ¼-second step to inspect a route. The reset control clears the pulse while retaining the arrangement.

Hold on the field to steer left in portrait (up in landscape) and release to steer the other direction. The Turn button is an alternative. Steering changes made inside glass or water take effect when the beam exits, so plan ahead for the next opening.

In Light Studio, choose Export and select a destination in Android's document picker. If saving fails, confirm the chosen provider has space and permits new files, then try another folder. Lumen does not require broad storage permission.

Flexible in-app updates work only for builds installed from Google Play with the same package and signing identity. Sideloaded builds continue normally when Play update information is unavailable. You may also update Lumen from its Google Play page.

Settings provide separate controls for music, effects, haptics and decorative motion. If a complex studio scene feels slow, reduce sources or recursion and close other intensive apps. Trace limits intentionally bound very complex compositions.

Email support@caulderoninteractive.com. Include “Lumen,” the App version, Android version, device model, mode or chamber, and the steps that reproduce the issue. Screenshots are helpful; do not send sensitive personal information.