Setup the itch.io project page today, will actually start the dev-work and challenge tomorrow. I'm taking the 'kill the rats in the basement' trope and running with it. Play as a rat catcher hired to clear out the castles of the kingdom. But don't forget your place in society, guards will kick you aside if you get too close, royalty will call guards to have you removed.
All the while you been paid to do a job. Kill the rats. Destroy the nest. Move on.
I'm starting with a hobby game engine I've been tinkering on for almost 2 years. My dev time is usually constrained to a 40 minute train commute so dedicating a larger portion of my free time to this should actually turn this PoC engine into an actual game. Hopefully =D