Hi and thanks for purchasing! If by background screens you mean background scenes, the screenshots are all custom-made with the assets provided - there is no pre-made backgrounds. You can make your own backgrounds by using the Backgrounds Tileset in your game editor.
Sorry for my English, I'm Brazilian and I use Google Translate, thanks for the answer,\PixelSpaces Full Pack\Tilesets & SpriteSheets comes with a png with the name backgrounds, but I can't find the png of the buildings described.
Terribly sorry for the late reply, I must've missed this from my notifications 😅 If you are referring to the houses and skyscrapers, they are located in the Backgrounds.png tileset