Muramasa is not an instant classic, but it is a work of art.
Story (8.8/10): Muramasa has two extremely convoluted stories, ones which I found very hard to understand, also, there doesn't seem to be much of a story element in the game, which makes it closer to a pure platformer, rather than an action RPG. However, I did find Momohime's story easier to follow and the game itself is well paced.
Sound (10/10): AMAZING! I've watched Japanese movies with less complex dialogue. The Japanese voice-over work is stunning, this IS NOT Japanese anime! The games score, composed by Hitoshi Sakimoto – composer of Final Fantasy XII and Valkyria Chronicles – is beautiful, it flows, flawlessly with the games visuals. Muramasa, has, possibly, one of the best sounding original scores of the year.
Game-play (9.0/10): Muramasa is no doubt a fun game to play, but, its nothing that hasn't really been done before, the highlights of game-play, are the simplistic controls and the amazing sword-play and hit combinations, the lowlights are, sometimes completely barren landscapes – sometimes void of enemies for 4-5 screens – and the endless backtracking (which I didn't mind, it seems like a good excuse to take in the scenery, but it does get old and rather fast). I liked the concept of swords as keys, but I thought it could have been done much better (AKA, less backtracking).
Overall (9.25/10): Muramasa is a fun game to play, highlighted by its amazing visuals, great voice work, stunning soundtrack and simplistic, yet fun game-play. It's by no means an instant classic, but it is one of the best 3rd party Wii games, since the systems release. Besides a slightly convoluted and barely there story and some minor game-play flaws, Muramasa is a must buy for any Wii owner.