Thanks for playing! The girls are drawn, perhaps the filter muddies their details a bit. Thanks for the tip on the canvas scaler, don't remember why I switched from it. propixelizer does the pixelization calculation as a material and pixelization process as render method which lets it do outlines, shadows, depth. The screen dither is a seperate post process effect with its own pixel size which is why it may look mixely - I haven't polished it up, I'll take a look at ditherdown too.
Good point about the edith piaf song, looks like it's not public domain.