Controls
Desktop: D / F / J / K or 1 / 2 / 3 / 4
Mobile: tap the four lane buttons below the game.
How It Works
Each song is analyzed in your browser before play to create a beat-based chart.
Session data is temporary and clears when the page is refreshed or closed.
Every run ends when the selected song ends.
Judgement
Perfect / Good / Miss. Higher difficulties use tighter timing windows,
faster charts, and stronger miss penalties.
