Japanese mind bending

I found this "river IQ" game... it's really fun, but kinda hard. (I totally got it, though.) The instructions are all in Chinese or Japanese or something I can't read, but here's what I remember of the rules:

1. You have to get everyone to the other side of the river.
2. Only two people can go on the raft at a time.
3. Only the mother, the father, and the policeman know how to operate the raft.
4. The criminal can't be left with the family without the policeman.
5. The mother can't be left with the boys.
6. The father can't be left with the girls.

I think that's all of them... it'll give you a little sad noise if you do something wrong, so you can kind of figure out the rules by trial and error, like one of those lab rats in the maze that gets an electric shock when it goes the wrong way. Try it, it's fun!