Wii and 360 are different developers if you didn't know. Something to consider.
I'm stoked for this. The gf says it's hard. Is there any amount of difficulty? Or is she just a noob?
It depends on the difficulty. It comes something like Casual, Intermediate, Experienced.
I've been playing on casual because I want to be more immersed with the Ghostbusters rather than the challenge of a video game.