I'm a huge fan of Sci-Fi concepts so I really like what you did!
I tested both versions but didn't see any major changes but font size.
I think you should port this concept for Breeze and/or Maui SDDM because those versions allow us to use pictures. Sometimes I create multiple users for testing and after some months of inactivity I tend to forget the exact same username. In this concept of yours, we have to enter our username manually. Using Breeze/Maui we only have to worry about entering password.
Well, that's my humble opinion. I'm also doing some Sci-Fi on my spare time. Are you thinking of doing Sci-fi icons too?