Very interesting. I wonder if there are actually more balls, and the powers described are just one ball's.
One thing about the article frustrated me, though:
game by Nicalis, Night Game, appealed to me because it'd been worked on by Nifflas
Methinks this should be "game by Nifflas... published by Nicalis". As is it gives the impression that Nifflas worked on the game as like a level designer for hire.