Just downloaded your app, as I was looking for a more curated solution that what OP provides (I don't know enough about art to make my own selection).
One quick question I had was if it is possible to have Artpip only apply a background to one screen. I have an external monitor and I'd prefer if the two didn't always show the same wallpaper. Additionally, I have one personal wallpaper I particularity enjoy, and would like if I could keep that permanently on one monitor, while simultaneously running Artpip on the other.
Unfortunately no, not at the moment. This is a commonly requested feature though, so I'll definitely be adding support for different options for multi-monitor setups at some point.
One quick question I had was if it is possible to have Artpip only apply a background to one screen. I have an external monitor and I'd prefer if the two didn't always show the same wallpaper. Additionally, I have one personal wallpaper I particularity enjoy, and would like if I could keep that permanently on one monitor, while simultaneously running Artpip on the other.