All of these are more than worth the money and not M rated:
World of Goo (5/5)
Koripinia: Marble Mania (4.5/5)
Pinball Hall of Fame (5/5) (best pinball sim ever)
Medal of Honor Heroes 2 (4/5) (best FPS controls)
Geometry Wars (4/5)
Boom Blox (4.5/5)
Toki Tori (4/5)
PES 2008 (4/5)
GH:WT (4.5/5)
Ghost Squad (3.5/5)
Wii Code 3456 7941 4060 2924