No need to apologize: I planned to add text with the instructions to play, but the time was not enough.
Recent community posts
> error opening #P"/home/borodust/quicklisp/local-projects/./pics/manos.png":
> No such file or directory
That means that you don't change the directory to /home/borodust/quicklisp/local-projects/mc-wolf3d before load the game.
I you are using the code, change the directory to mc-wolf3d/ before load the system.