Although this is kind of cool, I would be one to suggest that you clean up the lineart a bit more... Sketchiness is a quality that is appealing only in moderation; too much sketchiness can distort the form of the subject :P
You can't make an animation, per se... The animation is a built in function for paint bbs and oekaki bbs (I think) which documents the progress of the piece... You aren't personally animating :) So don't worry, you don't have to be confused :)
drawn in 40 min