With a little care, I found that you can build Markus Hoffmann's X11-Basic under Raspbian. Here's how I got it to build: Running X11-Basic (sorta kinda) on Raspberry Pi.
Neither of the compilers seem to work, and some of the interpreter's graphics demos look a little corrupted, but it runs well otherwise. GFA-Basic was very popular back in the day, and this seems to be a faithful and solid work-alike.
cheers,
Stewart