More news! Boko says the game's progress is about 40%, and he uploaded a youtube video to show the basic gameplay!
There are yet only normal attacks and one of the hit sounds will probably pierce your ears, but the movement looks great: the animations look more natural (and more bouncy too), and I don't have eagle eye, but it looks like the game is running at 60 fps, as it looks WAY smoother than his other games and videos.