Minecraft has been getting quite a bit of attention lately. There are parodies all over the Internet. The popularity of something on the Internet is proportional to the number of jokes made about it, I suppose.
The graphic quality is good, but it's simply not smooth. It looks good in a few places, but the animation is overly jumpy and detracts from the animation. The roughness of the animation is nearly made up for by the good quality of the frames that are actually there and the facial expressions of the characters.
The facial expressions of the characters and the way the creepers move adds to the silly theme of the animation itself. The creepers swing along as if to say "Don't mind me. Just creeping around.", but the protagonist is rightfully confused by their odd appearance.
That being said, Minecraft jokes related to creepers are a common theme in Minecraft parodies. They're done much too often. The parts with the lava and the chicken were original, though, and show that this flash is about more than creepers exploding and causing havoc.
The ending with the chicken is the best part of the animation. It's unexpected and not entirely logical, but it's just what was needed to end the animation.
Overall good animation and very good considering only eight hours of production time.