Very cool. I'm a lisp programmer now, but this reminded me that as a teenager I was learning how to do games programming on my C64 using an incredible Forth compiler and games framework called White Lightening.
There was also a BASIC version of Lightning. I never had the Forth version, but played around with the BASIC variant.
BASIC implementations of everything in that Youtube video came with it, and it had funky things like pre-emptively multitasking for BASIC programs (fairly simple - just use an interrupt or hook into one of the BASIC entrypoints and count time slices and shift some pointers around) + separate programmable sprite animations (so you e.g. could start sliding a sprite over the screen and let your BASIC program keep doing other stuff
BASIC implementations of everything in that Youtube video came with it, and it had funky things like pre-emptively multitasking for BASIC programs (fairly simple - just use an interrupt or hook into one of the BASIC entrypoints and count time slices and shift some pointers around) + separate programmable sprite animations (so you e.g. could start sliding a sprite over the screen and let your BASIC program keep doing other stuff