Which game engine are you using?

[artless]

How could I make a text-based UI like this?
Thank you.

[Bigosaur]

Hello,

I wrote a custom engine in C++ using SDL2 library for rendering and SDL_TTF to get individual letter graphics from a font file at runtime. I wrote my own text layout algorithm specifically for this game.

If you are looking for some ready-made library, check some of the open source engines used by classic roguelike games. There's a nice list on the /r/roguelikedev/ Reddit - take a look at their "Tutorials" section for a list of libraries for various programming languages.

If you use Linux/macOS you can also take a look at ncurses library which provides text-based interfaces for the terminal/console. I have used it in the past, it's very simple and easy to use (not sure about Windows support though).

[artless]

Thank you for the suggestion.
I'll try /r/roguelikedev/ tutorials first.