In the book, Arya had black hair and green eyes. Do you think that the girl who played Arya in the movie was good enough so thatwe can ignore those details?

I don't think the actress was good enough. In the first place, the movie was related to the books, but not quite there. It's like saying 'the hay in the needlestack,' really reversed. I always imagined Arya as someone with shoulder length, wavy, black hair, an angular face, with a lean but proportionate body. Many other people I talked to had the same idea, or close. Unfortunately, the movie makers went and messed it all up.

she was okay i looked forward to seeing the elf in the book though

I wouldn't have cared if she actually had her behavior, but she didn't act like an elf at all. they've destroyed her personality