To use this application, download this repo onto a Bela, as well as your personal machine, and connect both devices to the same network. Then, from your personal machine, start the project on http://bela.local before installing the GUI.
As a prerequisite, you will need NodeJS installed, which is available from most established package managers (apt, homebrew, etc...) or you can download it directly online. Then, from inside the project directory, run:
cd react-app
npm install
npm start
This will install and launch the GUI in your default browser, at http://localhost:3000, and upon successfully connecting to Bela you can begin playing. :)