Well done
I love your episodes man, so simple yet so effectivly entertaining. Congratulation :)
Here's my review...
Graphics : simple and pretty. For your next episode I suggest you put more shading to your characters as well as shadows (it will look so much cool :D simple shadows would do it)
Sparks when the metal weapons collide would also be nice. Ever thought about adding motion-blur ? blurred trails you know...during the slo-mo or during the speedy fights that would be up to you, would be a good eye-candy.
One last thing, you know that black blast area after the ninja gets electrocuted ? it should be two-toned, the part on the floor should be a little darker to actually make you feel that the blast is on the wall and the floor (Simple lighting realism). That's the kind of detail that gives a movie the right touch.
Sound : Awesome, fitting music and cool fighting sounds...not much to say here to make it better :)
oh yeah, the heartbeat sound during the slo-mo is hardly audible...
Interactivity : Nice modified NG preloader... longer episode could require something better with scene selection and all.
Style : A success, like the madness serie you know, simple characters, great action good job on that :) Longer episodes would definitly be a cool improvement, more complex fights and more complex levels too (with stairs, holes, etc)
Violence : Not much but I like your non-bloody style of it. I'm getting tired of the accumulation of blood in every action movies.
Humor : Not really funny, but really entertaining.
That's about it man.
I rarely review movies so intensivly, but I think you deserve such a detailed review. I hope my comment and suggestion will help.
Peace