I've completed the map for the dungeon for the RS! demo. The dungeon is just a singular map about 80x120 tiles large. This is the very first location in the game and won't take too long to get through.
As far as programming work, I wrote systems to handle cutscenes as well as map-interactive objects such as save points and treasure chests.
This is nitty gritty stuff, but maybe someone cares to know about it.