According to the associate producer James Young, Unlimited Adventures doesn't allow its users to edit spells or items for the following reasons:
"Again this has to do with our license agreements with TSR as these items, spells are essentially owned by TSR. We were lucky that they allowed us to edit monsters (or did we get away with it:>). Also by allowing users to edit spells and items would have created an immense headache for the programmers."
The game box's cover features a painting by artist Clyde Caldwell, earlier used as the front cover to Steve Perrin's 1988 RPG module "Dreams of the Red Wizards". (It's slightly modified, replacing the subject of the crystal ball scrying from a blonde woman to a foreboding fortress.) Add