We have no idea about the difficulty. Aside that there will be difficulty levels. DoctorM64 is kinda hush hush about the technical aspects of play But does it really matter if it's too easy? It's frickin' metroid 2 looking sexy and with a map
Oh and compare the music in the video to this [ame]http://www.youtube.com/watch?v=UiRf6ZajRqI&feature=PlayList&p=99E7FE79B0E8AC34&playnext=1&playnext_from=PL&index=46[/ame] - original Game Boy version of the song.