Fun puzzle! Made me thought of Hexcells on steam, which I admittedly have sank way too much time into.
I think you have an excellent set of rules in place for an addictive puzzle game. Hope to see it made into a full game!
Thanks for playing! I hadn't seen Hexcells before, but I just looked and I can definitely see the similarities. I'm certainly thinking about working towards and expanded version (if I can bear to look at the code again!)