Instant changes and no reload/recompiles.
Every couple of years I tell myself, "I'm going to do my next project in Clojure; reality be damned!". But always I give up and fall in line.
I suggest some reading about Interlisp-D, Lisp Machines and Common Lisp commercial IDEs.
However when I talk about Lisp I seldom think of Scheme, due to their differences, in spite of the common parentheses.
Yeah I was about to say, I can't think of any Scheme implementations or descendents with robust support for hot swapping.
The most popular Blender-connected game engine around right now is Armory3D. There is an early WIP successor to that being built in Rust by a former Armory developer: https://github.com/katharostech/arsenal
Would like to try it out sometime.
As far as I could see there’s no open source license in the repo though.
If I may I would like to suggest that you release it under the terms of the ISC license. It’s a highly permissive and very short and simple license.