Got my internet back just in time to for this.

Theme makes me think of Subterrain and Dungeon of the Endless. I'll probably do something like the DotE where you have bunch of rooms that you can power and monsters only spawn in unpowered rooms or something, to fit better with theme I guess I'll have you start off with all rooms and enough energy to power them all and slowly reduce your energy instead of adding rooms faster than you probably get more dust/energy like Dungeon of the Endless does.

Not sure how I'll do the actually dealing with the monsters that spawn.