hi,
All Amigas has kickroms that are still copyrighted today. To run anything on the (any) emulator you need this rom(file). to distribute our game for free we use a rom that is also free, but becouse it is not "original" and still under developement it has its issues (crashing the game). the game in the emulator zip file is made compatible with that custom rom.
the other versions are for original systems/rom.