Install sdl2 and sdl2-image… Install a Common Lisp implementation… Install Common Lisp packages (and transitive dependencies) on your system and make sure they are available in ASDF:CENTRAL-REGISTRY. I recommend installing them using Guix
Sorry, I have absolutely no idea how to do this. Is it possible to play your game without doing these steps? Alternatively, could you give instructions of which commands I should run to make it work?