I have found a better way to assemble 6502 code than Virtual 6502 Assembler. I installed DASM from the official Pi OS repository on my Raspberry Pi-400, rewrote the KickAss source code, and assembled that into a BASIC loader program. Took long, because of differing assembler directives, and a nasty typo 🤬

screenshot of a Rasberry Pi OS desktop, running the helloworld program in a C64 emulator