When you press Ctrl-d in a dungeon, the up arrow should
destroy the object in the direction you're facing.
Currently, the up arrow destroys the object north of
the party, no matter what direction the party is facing.
The other arrow keys should work in a similar manner:
down arrow = object behind the party
left/right arrow = object to the left/right of the party
It'd be great if you could use Ctrl-d to destroy energy
fields in dungeons. However, I'm not sure if this is
possible, because energy fields in dungeons aren't real
objects like monsters.