Definately a keeper
Great job for a second flash film, and if you're at this quality already, I can't wait to see your stuff in the future. Now, the character models (such as the underground workers) was really effective because they showed the true style of underground workers and I also liked the way you added all the tiny bits of detail to it, such as litter. The graphics could use a tune up as the pictures tended to be a bit wobbly from time to time and the backgrounds were often just an empty blue, but meh, theres still plenty of time ;). The sound quality was great, Kenny (R.I.P. poor dude) had a really strong sense of an angry personality in this film too and an evil smile to match. One of the main things that I noticed is the blood effects need tuning up a little, instead of just being a splodge of a single colour, try adding shading or glistening to it and also making it run across the floor.
Anyway, all in all, it was a really good submission and I hope to see more in the future :) Until next time Skippy!