I've been writing a game off and on that's sort of at the intersection of a Zachtronics game and... Starcraft? I guess? With some Factorio in there, for good measure.
The idea is that you have to break into and exfiltrate data from a laboratory that uses their own transputer-like architecture. Write a mobile program to explore the network, another to start migrating the data, and so on. Migrate too hard and the humans notice and reboot the network, kicking you out. There could be other players in there too. Of course, the nodes run the lab's terrible version of Forth. There's no UI, you connect via a TCP socket, and are expected to write your own tooling.
I'm not sure if this is a good idea or if I'm having a psychotic break.
The no-UI part will probably deter a big portion of players. Allowing own tooling on the other hand sounds cool. Adding an optional UI, or getting someone to do it for you would certainly help. But then again, if it is interesting enough, someone might just do so after you launched it without a UI
I'd play it.
hooray! one potential user, market validated