no0t bad
good job eric! it looks like you worked hard on this, and even though im not a huge fan of anime or ninjas, this still was very good! here are some things i think would make it better, and would better your skills as well:
work more on your anatomy, it looks like youve been practicing already. looks ok, but practice will make it look really good.
the audio levels were off. the music was louder than the dialogue. i could hardly hear what the ninja was saying.
perspective. read up on perspective and practice it!
good job, keep up the good work!