So, I install sbcl, installed quicklisp and then used quicklisp to install your game after cloning and cc'ing into your directory. It looks like your game would work if you (or someone) looked into why your "Harmony" sound engine isn't working (line 28-29 in your package.lisp file). I attempted to load from your github/Harmony directory and this is the error -
* (ql:quickload '(harmony cl-mixed-coreaudio)) To load "harmony": Load 1 ASDF system: harmony ; Loading "harmony" ............. debugger invoked on a LOAD-FOREIGN-LIBRARY-ERROR in thread #<THREAD "main thread" RUNNING {7008640253}>: Unable to load any of the alternatives: ("libmixed2.dylib" "libmixed.dylib" "mac-arm64-libmixed.dylib")
I tested the other audio implementations suggested as well and they don't work either. Is there a way to play this game without sound? That might fix the problem. I don't know how much I'm willing to dig into this, because cl-mixed is it's own library and it looks like it would start to become a rabbit hole.
It looks cool though!