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At the default scale of 90, I can't see anything spinning at all even with the video full screen. If I set the scale to 250 or larger I can see the stars spinning, but I just see the whole field spinning. Even if I get so close to the screen it almost fills my field of vision.

So for me either the stars are too small to see any motion, or I can see them all spinning no matter what.

What effect am I supposed to see?

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If I set the scale value (150) to roughly the ppi of my screen (4k 27"), I can see the effect. You should see the rotating stars only in a small field of view (fov) where your eyes are focused and all other stars should seem to remain still.

My phone screen is a bit over 500 ppi. I tried it full screen across the entire range that it's in focus (I'm mildly nearsighted), and I could just see the things spinning across the whole field if the pinwheels were big enough to see motion at all.

Maybe it doesn't work on small/AMOLED screens?

Try it in full screen, if you did not.

> What effect am I supposed to see?

I can see only a tiny area in the center of my vision animate (at default scale). The larger the scale, the bigger the area.

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