This is a really good animation with some flaws regarding audio. The volume levels throughout the video are inconsistent with each other, which would prompt the viewer to turn up the volume and possibly "maintain" it throughout the video. Some sound effects are also nonexistent and could certainly be used to go with particular actions, such as whacking an alien with part of a pipe, or whatever that is.
Even so, this animation was quite great. It looks fluid and natural, making it match up to some famous Newgrounds animators. The storyline was quite entertaining, and I'd like to see more soon. Just fix the audio problems and you'll have yourself a spectacular animation!