Haven't played it in a while. Having never played any tabletop games (you know what I mean, right?), I might be wrong in saying it plays a little like a lighthearted one of them. You have a whole map to play across, and character improvement (read: mask and rahi hunting) is necessary in order to beat Makuta.
It's not illegal, it's just cheating.
I'm into exam time right now... I'll be checking up frequently, but I don't expect to be posting in the next two weeks or so unless something really catches my eye.