This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Try Microwave by Jim Nitchals and Jay Zimmerman. Jim worked on sound drivers with Steve Hales (primarily for the Mac) under the company name Halestorm. The company and its technology was later sold to Thomas Dolby's Headspace. Another game that plays music through the speaker while your character moves is Dig Dug. In both games the sound is a bit on the choppy side. By: Rubywand