I started my entry yesterday. It's quite likely that I won't have anything usable by the deadline, as the huge amount of real life work that I've had since the beginning of the semester shows no signs of going away soon.
Still, I'll work on it whenever I have any free time.
Here's an in-Hammer shot of what I have done at the moment:
I've decided on a sequence of events that I can make simpler or more complex depending on how much free time I end up having to work on it.
The general gist of what happens is that the player starts off in their fancy house but has to descend beneath it for safety.