So this contest seems to be moving a bit faster than I remembered.  My game "does stuff" at this point, but it is effectively unplayable.  I'm now cutting corners with a nicely extensible menu system where one class is handling all in-game menus, which should speed things along.  That screenshot from days ago is effectively where I still am...

At this point my game is approaching complete, although the next 5 hours would be hectic if I were to actually finish it.  However, even if I finished coding it, the game is actually quite atrocious.  It's not fun to play, it's entirely too short (4 levels!), and I'd probably lose on innovation (my friend replied to my description with, "Oh, it's like Lemmings!").  So rather than waste a sunny afternoon on this mediocre project, I think I'm going to have to abandon it.  I was rather impressed with my menu and message system, so it's a shame I won't get to submit just those as a "final" submission.
Anyway, best of luck to those who are sticking it out!