@Archimage That's encouraging. 😊 Should I ever come around to implementing my own, I will probably write in assembly, targeting one of the microcontrollers I know. The Sharp LR35902 (Game Boy), most likely.

Have you visited the Forth Haiku Salon? It's a playground for writing and sharing short visual Forth programs. It might be a fun exercise to port (some of) its glossary over to your Forth, to get basic support for graphics programming.