Every adapter shares one playback surface, built on the core’s Ticker. The examples below use @blinn-motion/dom, but the API is identical for Canvas, React (via a ref) and React Native.

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Play, pause, toggle

const player = create(stage, doc, { autoplay: false });

player.play();
player.pause();
player.toggle();   // flip whichever state you're in

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Seeking

player.seek(0.8);          // jump to 0.8 seconds
player.seekFraction(0.5);  // jump to the middle (0..1 of duration)
Seeking works whether or not the player is running — it resamples and repaints a single frame.

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Looping

const player = create(stage, doc, { loop: true });

player.loop = false;  // stop looping at runtime
player.loop = true;   // resume looping

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Speed

Set the playback rate with the rate option (a multiplier on real time): 
create(stage, doc, { rate: 0.5 }); // half speed
create(stage, doc, { rate: 2 });   // double speed

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Build a scrubber

Use onframe to keep a slider and timecode in sync, and seekFraction on input. Pause while the user drags, so playback doesn’t fight the scrub. 
const player = create(stage, doc, {
  loop: true,
  autoplay: true,
  onframe: (t, fraction) => {
    if (!dragging) slider.value = String(fraction);
    timecode.textContent = t.toFixed(2) + "s";
  },
});

let dragging = false;
slider.addEventListener("pointerdown", () => { dragging = true; player.pause(); });
slider.addEventListener("pointerup",   () => { dragging = false; });
slider.addEventListener("input", () => player.seekFraction(Number(slider.value)));
This is exactly how the live demo on the Blinn Motion site drives its keyframe timeline — onframe moves the playhead, and dragging it calls seekFraction.