I’ve written a version of 2048 - a small puzzle game, originally by G. Cirulli - and kept it within
the 4K rom limit of the smallest, original GCE cartridges without having to compromise anywhere.
It has an attract mode, sounds and keeps the current high score in the Vectrex high score string
just like the old games (so it is temporary and you see it by pressing reset).
Obviously you can play this on a multicart where you can add games but since it is so small you can also
quite easily build your own cartridge by converting an old one using a 2732 eprom and an original Vectrex 4K pcb.
I myself used a dead Berzerk cart. whose pcb/shell was lying around here for a few years.
In case you’ve never considered this: the Vectrex masked roms have /OE and A11 switched compared to a 2732 so
you have to reroute those lines. It’s quite easy since all you have to do is cut the two lines wiggling under the eprom
on the component side and reconnect.
So I’ve just cut at the red lines (didn’t have to for /OE since that trace was already missing), rubbed
off the paint from the two traces (green) and soldered the leg directly to it from the component side.
if you want to build your own - here's the label I've printed out to stick on mine: