[JetSetIlly]

The simplest 2600 games were just 2k in size not 4k. Combat for example, is a 2k rom.

If you want to increase your chances of finding something but still generating a "complete" rom, then limit the size to 2k.

[hagbard_c]

If 256 bytes is enough to code a demo...

https://www.youtube.com/watch?v=wlW84fEHngM

https://www.youtube.com/watch?v=O-WjF_dxdHM

I'd say gentlemen (m/f) start your random number generators

[drcode]

Let me introduce you to Hard 2632, a device for 32 byte demos: https://xayax.net/hard2632/

[anthk]

SectorLisp:

https://justine.lol/sectorlisp2/

Ok, Lisp and Forth can bootstrap themselves from a small core, but still...