Hmm, this game does sound interesting. From the IGN playtest:
While many games today are designed around slaughtering your foes and cutting their remains into tiny bits, Okami is the reverse of this; it's about rebuilding the world around you, making what was once beautiful but ravaged a peaceful place again. While there's plenty of combat here, you restore the land's wonder not by fighting but by painting. Giving life back to trees, restoring shattered statues and rebuilding the very fabric of existence is done with a few quick strokes of a very powerful brush. The game is certainly a breath of fresh air in the days of murder simulators (not that we don't love them too).
As you work through the game, you'll eventually build up 13 different brush styles, each affiliated with a powerful god who has passed away. The first technique you earn is called "Rebirth of the Dragon", which enables you to reconstruct things that have been destroyed or build upon existing things. One of the earliest painting puzzles in the game has you essentially refilling a lake by painting in some sort of cosmic dust. Another has you repainting the sword of an important statue simply to restore it to glory.
I'll definitely be checking it out, whenever it finally releases.