I think it is correct to say interlisp medley as the language (and not refer to it as interlisp-d because it is quite different to the 80s d machines - I’m pretty sure I have seen the Medley crew give this correction before). Of course, interlisp is a complete programming system which includes its common lisp implementation.
Pixel Outlaw, I am so happy with your game and your promulgation of the incredible work by interlisp.org.