Free, offline, one tap to start.
One self-contained file, loaded lazily so it never slows down this page — works fully offline once it's loaded.
One self-contained HTML file — no ads, no third-party trackers, no account, and it keeps playing with the network off. When a run finishes it sends us one anonymous line: your score and how long you played, nothing that identifies you. Here's exactly what's in it.