It has its own scripting engine, so you can write in-game programs to do exploits and things. It’s not super complex, but you do need to actually write code to play it well, but I really enjoy it
Definitely helps to be able to at least read and understand code. I remember the documentation being decent enough. IIRC it was a thing to provide scripts that look helpful but actually contained malicious code to do all sorts of nasty things to your in-game system. It's really cool.