In the beginning when the DeLorean appears, shouldn't Biff and George be curious as to what that sound is?!
Also when Marty goes downtown is it responsible to leave the DeLorean unattended like that?
Just some minor issues I'd thought I discuss here. Doesn't really bother me though. I think it's because of the pacing of the story, the game only really starts when you arrived in the new era.