Did you, by any chance, work on "Stunts" at Broderbund too? There's a reverse engineering effort around http://forum.stunts.hu/ that would dream to have a glimpse of the source code :)
With Broderbund I worked on:
- Showoff (https://www.whatisthe2gs.apple2.org.za/show-off-/), a kind of PowerPoint software
- Downhill Challenge (port from Atari to Apple II GS - https://www.youtube.com/watch?v=6V5JZGHox7I)
- Prince of Persia (port from Apple II to Atari ST)