Hypernucleus has too many syllables in my opinion. But if it's too late, that's OK I guess. I would go with a shorter "hyperNuke". Less of a spelling problem as well. But if it's already hypernucleus, that's fine :)
I also think it would be cool if it could use pypi or even pygame.org as a backend. Maybe not at first, but more backends would mean that people don't have to worry about submitting to hypernuke, or resubmitting if their game already exists somewhere else. The problem with pygame.org is that the fetch mechanism is pretty loose - some people put a source, some put exe, some just link to their website where you have to find a download. So that would need to be sorted out. At this point though, I do like browsing the games at pygame.org a lot. But having one click to download and play would be a big added benefit.