I’ve never done an RPG for Ludum Dare before (also on the list: Driving game), so I really want to go in that direction if the theme supports it. I’ve been practicing my procedural dungeon map generation. As a bonus, this could also work really well for a Master of Orion style galaxy — instead of rooms, those could be stars connected by hyperspace routes.
Brown Blocks = Rooms
White Lines = Room connectivity graph, based on a relative neighborhood graph with a bit of minimum-spanning-tree work.
Green Blocks = Hallways based on connectivity graph.