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Browsers and phones require a tap before audio can start. Tap "start" on the game, and make sure your device isn't on silent / muted. On iPhone, flip the side mute switch off.
Swipe (or use arrow keys / the on-screen buttons) to slide the tiles. Equal numbers merge — and each merge plays a note, so the better you play, the better the track sounds.
Use the globe icon at the top of the page (繁中 / English / 日本語).
Yes — no account is required and we collect the minimum needed. See our Privacy Policy.
In the iOS/Android app, manage or restore purchases from the app's settings; billing is handled by the App Store / Google Play.