Media Molecule's Alex Evans and Mark Healey revealed at GDC 09 that LittleBigPlanet is only really half finished.
"We still feel like we're halfway through the development of LittleBigPlanet, to be honest," said Healey.
"I claim that LittleBigPlanet is potentially a game creation package, which isn't finished if you like, but potentially."
"We want LittleBigPlanet to be something that enables people to make games, not platform game levels."
The least-finished part of the game is the content creation side of things, said Evans. Read what he has to say about that, and more, over at Eurogamer.