The musical score in the original version was designed to exploit the 15-voice Ensoniq audio chip in the Apple IIGS computer. For this reason, other ports, while most able to mimic the game graphically, had to considerably scale down their music quality. For example, the music in the DOS version is limited to the PC speaker and the Amiga version had to omit musical instruments as well as cut out notes because of its 4-voice limit (which was further limited due to the use of in-game sound effects requiring further voices).