I'm uncertain, but I believe development is still going on, based on what I've found. No clue why there hasn't been an update for this for ages, but they have a profile on Bluesky on which they posted about this game just a month ago. They also said earlier that they'd like to work on their projects more.
"the dream is to be able to work daily on my games.
so, instead of 8 hours daily in a job, those could be put directly to Necrochess, or Trail Of Pigs, or other stuff i'm working on
And i know myself. When i get free time, i can be crazy fast when developing. i have to try!" - StopSignal, 2 months ago. ( They were also talking about starting a patreon to support them, so that they're able to focus on games. )
If you want any potential updates, you can go to: https://bsky.app/profile/stopsignal.bsky.social for any potential further updates.
As for the Patreon, I'm not too sure what's going on with that.
But yeah, hope this helps!
( Linked reference from a quote I pulled earlier )
