Really really hard, but I managed to get through the game.
At first I was like: "Why a samurai?!" and then *Boom* PARRY. Really nice idea, but I would have loved to be introduced to that feature earlier in the game :)
Also: the collision is really wonky. I got stuck several times on walls and platforms. While this is a nice hack to stall the next gravity cycle it felt really weird.
But all in all a nice entry! Thank you!