There's a hidden credit line in the game's ROM which reads:
(C) 1992 Basement Boys Software

Basement Boys Software were a group famous for making hacking tools on the Commodore 64 in the late 80s, who had some members go on to Chip Level Designs, a company that used to provide sound programming for a number of SNES titles. The same credit appears in Cool Spot.
Contributed by Dazz