Thank you so much for the whole video with your look on installation process! I’ve even updated installation instructions a bit in a git repo.
I’m sorry the game won’t build for you. By the looks of it OpenBSD does only have ancient version 4 of liballegro as a binary package, but there’s port of allegro5 required for the game, so you might have luck with that: https://www.freshports.org/devel/allegro5
As to discussing Lisps, I’m always ready for that 😊 I gather you have a podcast of your own, so perhaps it’d be nice place to talk things?..