Interesting code and fairly readable; I liked the simple scripting system, and there were a few comments and examples, and yes - double buffering of the Mode 13h screen (though the memory allocation seemed weird, but maybe there was a good reason for that). Certainly better written code than what I was writing at 16, mainly in BASIC and assembler at the time (was a fan of the Lee Adams series of 3D programming books).
Affordable C compilers (for a teenager at least) were not really a thing at the time (IIRC, even the DOS stuff, if you owned such a machine which I did not, still cost a couple hundred dollars around 1989-90-ish). I didn't manage to get a C compiler until the mid-90s when I picked up a copy of Turbo C for DOS, but I still think I paid $100 for the privilege.
Affordable C compilers (for a teenager at least) were not really a thing at the time (IIRC, even the DOS stuff, if you owned such a machine which I did not, still cost a couple hundred dollars around 1989-90-ish). I didn't manage to get a C compiler until the mid-90s when I picked up a copy of Turbo C for DOS, but I still think I paid $100 for the privilege.