I have to agree with Wizball. I remember playing it on the C=64 for hours at end. The music and gameplay was great, so when I saw a copy in the shops for the Amiga I grabbed it hopping to relive the good times but was disappointed, especially with the music.
Another game I loved on the C=64 was called Dominator (I think, it was made by System 3 from memory). Music/Graphics and gameplay was great on the C=64 (I even loved the loading music when loading from tape

), but when I got the Amiga version, it felt like it had actually been downgraded.