I finally got a chance to play with Omnivore and create a sample Jumpman level. This is really fantastic work - thanks for all your effort! I will certainly try to come up with a level, and if it's not awful, submit it :-)
FYI, I read through the reverse engineering notes and saw mention of Jumpman being a copy-protected disk.
I've dumped two identical original Jumpman disks (one of them from shrink-wrap) and there is no copy protection that I can identify. Perhaps an earlier or later release had copy protection but these disks did not.
The dump is in my preservation torrent but I'm attaching it here as well. Hopefully it helps clear up any confusion about what is original vs. "hacked" code.