Okay, so I've thought of a few things, and I noticed that most of my ideas revolve around the idea of light and dark being juxtaposed with the following qualities:
- Light is a deterrent, a weapon, a companion, and a liberator and uniter,
- Dark is oppressive, also a weapon, a negator, a condition, a separator, and an isolator.
Then I thought of a Day/Night cycle where during the day the light has certain qualities, and during the night, the dark has certain qualities, and both play off each other or seek to affect the other. So now I've got some ideas for mechanics and interplay, the question is how is it all going to play out (genre, style, etc). This is now my time to rapidly prototype some ideas and see what sticks.