Ready to move?
Breaststroke mode: arms straight forward, sweep them wide, then pull them in to your chest for one thrust. Flutter mode: kick your legs — faster kicking makes you rise. Open water: keep swimming, any stroke or kick counts, or the shark catches you.
- 1Enable camera›
- 2Start game
Keyboard: press or hold ↑ / space to stroke and rise.
Camera
Camera off. Nothing is uploaded; detection runs in your browser.
How to play
- Stand or sit facing the camera with your whole upper body in frame.
- Breaststroke: reach both arms forward together, push them out wide, then bend them back in to your chest. Every complete stroke pushes you upward.
- Flutter kick: alternate your legs up and down. The faster you flutter, the higher you swim.
- Stop moving and you sink — time your strokes to line up with the gaps in the reef pipes.
- Open water is seen from the surface: no pipes, no sinking. The faster your strokes and kicks, the further you pull away from the shark — and the further you swim, the faster it chases.
- Every pipe you clear is a point; touching one ends the swim.
What you train
Fitty Bird underwater, now a little friendlier. In breaststroke mode you reach both arms forward, push them out wide and pull them in to your chest — every complete stroke thrusts you upward. In flutter mode your legs do the work: the faster you kick, the higher you swim. Open water is the easiest mode: no pipes at all, strokes and kicks both count, and a shark hunts you from behind — keep swimming and your score is the metres you cover.
Movement: Breaststroke arms, flutter kicks
- Shoulders
- Legs
- Cardio
- Coordination
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