“Amor para Dos” is a multi-platform 256-byte intro. The binary, without any kind of modification, can run both on: a 80386 (or better) + DOS and on a Commodore 64. We (L.I.A) released it at Flashparty 2021. I did the coding.
From Commodore 64 to the present: a developer's journey
RETRO.MOE 