Why you’ll love it
- Perfect / Good / MissTight 85 ms perfect window at 112 BPM. Chain combos for bonus points.
- Reef energyEvery miss drains the reef’s light. Run out and the song goes silent — game over.
- A living highwayBioluminescent corals, pulsing lane lights and beat-driven camera motion, all generated in code.
- Procedural songsEvery seed builds a different chart of lanes, off-beats and chords. Same seed, same song.
- Handmade soundKick, hats, bass and gem chimes are synthesised live in your browser. No audio files.
- Play anywhereKeyboard on desktop, glowing touch pads on phones. No install, no downloads.
How to play
Goal
Hit every gem as it crosses the bright line at the striker. Clear the whole song with reef energy left > 0 to win. Energy hits zero → the reef goes silent and you lose.
Hit every gem as it crosses the bright line at the striker. Clear the whole song with reef energy left > 0 to win. Energy hits zero → the reef goes silent and you lose.
Keyboard
D/A/← left lane · F/Space/↓ middle · J/K/→ right · Esc pause
D/A/← left lane · F/Space/↓ middle · J/K/→ right · Esc pause
Touch
Tap the three glowing pads at the bottom of the screen — they match the three lanes.
Tap the three glowing pads at the bottom of the screen — they match the three lanes.
Scoring
Perfect = 100 + combo bonus · Good = 50 · Miss = −10 energy and combo break. Perfect hits give energy back.
Perfect = 100 + combo bonus · Good = 50 · Miss = −10 energy and combo break. Perfect hits give energy back.