I quite like this, but it does look like you've doubled the pixel size to allow anti-aliasing into the background. This doesn't add much to the animation. Pre-scaled pixel art is generally frowned upon on PJ, and a solid white background is against rule 4 of submission. This will be much nicer with a proper or transparent bg, and at true pixel size. 
Good things to know, I should brush up on the rules.
And I rescaled because I had trouble posting it elsewhere. I'll keep that in mind for the future. Tenks.