Natsume chose enemies that would make "the strongest impression" and could be defeated in different ways. The developers had difficulty adapting a television show into 2D computer graphics, explaining that they struggled the most with programming the character sprites against a 2D background.
Natsume chose enemies to make a strong impression and could be defeated using different methods.  The developers had difficulty translating a TV show into 2D computer graphics, finding it particularly challenging to program the characters' movements against a flat background.