I played NERO a while ago with Karvajalka, and it's a cute game that tries something different. The GUI and controls are easy, the tutorial explains everything very well, and there is no sign of the 'poor execution' Kaleo mentioned. Cool game to play for short periods.
And just for ShadowGandor's info, Black & White is far more complicated than this, it only doesn't smack you in the face with it. You would be amazed at how many stuff happens in B&W that you do not see.