So I'll start a log here, maybe that will help me make sure I finish something. I've finished a decent number of game jams (none on Itch for some reason) but these might be the most unique constraints I've worked in. I've just finished a week or so of somewhat intensive Unity study. My last commercial game used Lua/Love2D, but I need to step up to Unity big time, so this will be a good test of what I've learned.
I didn't officially join the event until today. I used the time I was able to spend on pinning down a workflow and finding a method to bring in Blender models and get them colored and lit--unlit as it turns out--appropriately. I worried that a 3D Unity project wouldn't look good with such a restricted palette, but the "toon edge" idea dawned on me in a quick design shower and I knew I had to take a serious run at this.*
I'm hanging it up for the day with a method for modeling and coloring. Tomorrow I want something loosely resembling a starting area, and I'd like to be close enough to a functional prototype that I can move around in it.
* A design shower is my design activity for any project that won't have proper documentation. I go in with a problem and come out with a plan. Try it if you haven't.