Last updated: August 2026. Short version: the game runs in your browser and we do not collect your personal data.
When you load a music file, it is decoded and played entirely inside your browser. It is never uploaded anywhere. The same is true of light sets and patch files you save or load — they are ordinary files on your own computer.
The microphone feature is optional and only active while you turn it on. Audio from the microphone is analysed in real time to detect the beat and is never recorded, stored or transmitted.
We store a small amount of data in your browser to remember your language choice and whether you have seen the tutorial. This never leaves your device and you can clear it at any time through your browser settings.
This site may use privacy-respecting analytics to count visits, and may display advertising. Advertising partners may use cookies to serve and measure ads. Where required by law, you will be asked for consent before any non-essential cookies are set, and you can change that choice at any time.
If you choose to load a YouTube link inside the game, YouTube's own player is embedded and YouTube's privacy policy applies to that playback.
This game is suitable for general audiences and we do not knowingly collect personal information from children.
Questions about privacy can be sent through the contact page.