Well damn, I guess I should have released Jam Ball 2 as a single .prg and categorised it as a onefile Demo instead of putting it on a .d64 with an ancient loader in front of it? The uncrunched code should run just fine on real hardware if you load it with an Action Replay or what have you...
Doesn't even need Exomizer, by a long shot.
Do tell us all why do you think this was written. Is it to say that (A) your prod should not jam if a cartridge is attached or (B) a cartridge should be necessary in order for your prod to work? I'm out.