Prevent the heat death of the universe with “this Madoka★Magica live wallpaper”:https://market.android.com/details?id=jp.co.digiadv.LiveWallpaperMad001 for Android.
Only USD $1.30, and not region-locked!
The “developer”:http://www.digiadv.co.jp/ seems to have a “whole series of the things”:https://market.android.com/developer?pub=da+apps. Seems to be legit, if the company’s website is any indication.