thanks for clearing the spinball thing up tinypaws, i do know the USA version of sonic CD for sega CD can be put in a music CD player and and you can listen to the music! (but skip track1, cause that stores graphics code.) Sonic boom!!!
not a problem, yeah apparently it was called the sega genesis in the USA because a floppy disk company had copyrighted the name ''megadrive'' in the USA patent system or something like that, so sega could not use it there. apparently the USA version of sonic spinball on the megadrive/genesis has different music from the UK one, but i'm not sure on the truth this. but yeah, megadrive/genesis, same system.
I hope i don't misunderstand what you are saying here, Genesis and Megadrive sonic games i think are the same thing, I live in the UK, and the Genesis was called the Megadrive there, do you live in the USA or canada by any chance?