I love the final episode! 10 note.
The enemies are less satisfying in this episode, with their erratic and random movement, taking lots of direct hits and moving way faster than the player and teleporting. It detracts from the feeling skill required to off them, and makes it feel a bit random when you're killed with little hope of avoiding taking damage.
Oh, well. Expected something more exciting than a bunch of ninjas. Also, got stuck in a wall and couldn't continue (it's the first time, by the way - never happened in the previous ones). While I really like your series and the whole retro feel, the final part seems somewhat lacking. Glad you put it up for free on NG, though.
I expected a better ending or more action... just a map with tons of ninjas and a ninja boss is a deception for the last part