Press the right arrow to go to the next backdrop. Use the keys 1-5 to alter the picture. 1; Color 2; Swirl 3; Fisheye 4; Pixelate 5; Mosaic Make sure you don't press the right arrow for too long, because you'll skip backdrops.
I did all the backdrops by myself, some based on the 'Pixalate' game. Original project; Pixalate & Brush If you have a backdrop idea, please mention it below. Though, it might not come out exactly as you pictured it…. I will try to update as many times as possible!