purrTTY is a Kitten Space Agency in-game terminal emulator
It runs a (mostly) VT100 and (somewhat less mostly) xterm compliant terminal emulator in-band inside KSA and renders the terminal UI using the ImGui framework that KSA provides.
Fonts come from https://www.nerdfonts.com/
Themes come from https://github.com/mbadolato/iTerm2-Color-Schemes
purrTTY is using the alacritty TOML formatted theme files