IGF-nominated Night Game is WiiWare exclusive

We've heard intermittently that
Night Game (working title), the Independent Games Festival award-
nominated action-puzzler from
Knytt Stories' Nifflas, would appear on WiiWare -- an
IGN interview with composer Chris Schlarb called it a WiiWare
and PC game. Nintendo's
huge press release this morning has made it official: not only is
Night Game coming to
WiiWare, it's a WiiWare exclusive.
Night Game involves maneuvering a ball through (the silhouettes of) various environmental puzzles.
Nifflas is directing
Night Game -- which has "no enemies and no violence" -- for developer
Nicalis, which you
may know from another high-profile WiiWare project:
Cave Story. Neither company has dated
Night Game. For that matter, Nintendo didn't mention
Cave Story in its press release outside of the blurb about
Night Game. Hopefully that's still on track!