Yes I changed my desktop background just to make the colors match with the ingame theme 😭
If you want to do this yourself you'll need to follow the steps in the Afternight Discord
(Discord invite) https://discord.com/invite/afternight
https://discord.com/channels/1092849712480129197/1181914158913040424
I'll try to explain it here, although I might miss a step or two
Download newest version of Bloxstrap
https://bloxstraplabs.com
Then download the most recent build from the window movement github
https://github.com/Adrigamer278/bloxstrap
Replace the default Bloxstrap directory with the new Bloxstrap directory you downloaded
Open the Bloxstrap Menu and enable game window movement, game window title control, and set window movement FPS to your Hz (monitor framerate)
Save
Run roblox using Bloxstrap (which can be done with "Play Roblox" which will have the bloxstrap logo)
Then choose any song in Project: Afternight compatible with window movement while your game is not full screened, and it should work. (idk all the songs with compatibility this is just the first one I found)