We can only use library that is provided by the SDK, as in the jam description:

You :  OK but can I use some libraries ?

Answer : Yes you can, but only those included in the programming language you will create the game with

So prettify the console using Chalk in node, or Curses in python is forbidden... or is it not?

P.S: can we also add audio?

it's forbidden.

You can use replit (which runs on Linux terminals) and use ANSI Color codes to prettify the terminal

here is a tutorial about ANSI codes in python :