BEEP8 is a tiny Javascript engine that lets you create games and experiences inspired by the look and feel of a retro 80s computer. It's not an emulator or a fantasy console: it's just a Javascript library. It's free and open source.
The files in dist are the only files you need to run beep8. You will also need the assets directory.
To develop locally you can run npm install and then npm run dev. This will run a watch script that will rebuild the dist/beep8.js file. To build everything run npm run build.
beep8 is a fork of the QX82 engine by btco. For more information, check out the QX82 site.