It's a very different type of RPG, and it is very, very unenjoyable.
Concept: Basically it's a Turn-Based Role-Playing Game, with some platforming elements to it, that don't make it any more enjoyable.
Story: You see, the problem with this game's story is that it's very uninteresting, RPG's have been alway's been know to tell stories while having a good game-play, but the story and characters of this game are based on Norse Mythology, and in my opinion, very boring, considering the fact that some of the cutscenes last more than 15 minutes.
Design: That is probably one of the best things about this game, the design's in this game are beautiful, and the cutscenes are beautiful but like I said, that story is boring, so in my opinion, the cutscenes are boring.
Overall: Avoid this game, but I'm pretty sure no one would listen to me, because most review's give it a good review, but, this is what I think of it.