That was a mind-blowing discovery to yours truly. After all, few, if any, of Nishikado's other noteworthy titles--like Chase HQ II: Special Criminal Investigation, Darius II and Darius Twin--could be described as bright or cheerful (two words that are practically plastered across the front of Parasol Stars' manual, below).

Of course, Nishikado also had a hand in creating the SNES RPG, Lufia & the Fortress of Doom (known as Estopolis Denki to Super Famicomers), so clearly the man wasn't against creating a colorful game or two.
See also: Other posts about Parasol Stars