Most trailers of Muramasa: The Demon Blade focused on action. This clip shows the characters you interact with and then action. In between scenes of Kisuke (blue warrior) and Momohime (princess in pink) cutting through demons there is a glimpse of the weapon building tree which has a total of 108 blades.
Another interesting tidbit about Muramasa: The Demon Blade is it has two modes. Musou mode includes RPG elements like character growth while Shura mode focuses on fighting. Sounds like Marvelous is trying to broaden the audience for Muramasa: The Demon Blade by making one game appeal to two crowds.