Actually, the flickering, which is evident in real stars as seen from Earth, is a result of the distortion effects of our atmosphere, which is a personal bane of astronomers.
The slow, regular pulsation of some of Oddworld's stars is merely a stylised representation of that effect, as far as the memory cache of each screen can manage.
Pulsars are far too dim, and any so close to be that bright would have obliterated Oddworld as a habitable world during its formation, lest it formed before the Oddworld did. A very visible supernova remnant should fill the sky, too. It would be quite a sight, especially considering that it is illuminated by a pulsar, so it would be as if there were two flashlights spinning around in the cloud, illuminating different parts of it.
Oh, and the sight itself would also be lethal.
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