Really enjoyed this. I've always found the 'sugarcoated tale of death and horror' to be a very interesting method of delivery, such as the way it's used in Adventure Time. The story being told was also very interesting and engaging, if a little difficult to follow due to the speed of delivery.
I've got a couple of criticisms, though. While the animation style was incredibly smooth and fluid, it felt sluggish. I was running the animation at full FPS most of its length, but everything just felt a little bit... floaty. Your tweens should probably be a little shorter. Past that, it does get extremely processor intensive. I'm on a gaming rig that can do Crysis 2 at 1080p and 60fps, and I was lagging in a few sections. I noticed that you have a youtube version, as you mentioned in the description, but it's common courtesy to leave a link for people. Forcing your viewers to hunt for it is just kinda mean.
The cannons firing at the tank look like penises spewing their juices.
Boy, what a ridiculous amount of work you put into that. Fantastic effort.
Really like the unique art an music, but it's just too slow paced...
eh, pretty good