Oh my god...

Very good. Nicely animated and good message but...

...it scared the crap out of me when the girl with black eyes popped up with the beep...

Really now...

Like Iceleaf said, low quality graphics, shitty plot and crappy english.

However, I think this could be awesome if you executed it in a different manner.
+Add some background music to make it more dramatic
+Improve on drawings, not nessecarily animation. Could do still-pictures with subtitles to immerse the viewer
+Expand a lot on the script.. I mean, really now.. "And he became a zombie."
+Darker environments
+Creepy radio static & the likes in the background

If you'd do this and keep the "you are the demon" moment you'd get one hell of a flash with an awesome mindfuck at the end.

Epic

Pure win.
You sir, are my idol.
10/10 5/5

*sniff*

In the victory of the immortal ideas of Communism
We see the future of our country,
And to the Red banner of our glorious Fatherland
We shall always be selflessly loyal

Like

It's a bit repetative but other than that, great work! :D