I don't really understand how one has the nerve to ‘fix’ levels in a classic game. But at least, I vaguely remember reading that it might be possible to disable

I don't really understand how one has the nerve to ‘fix’ levels in a classic game. But at least, I vaguely remember reading that it might be possible to disable gameplay changes in ‘Revision’—haven't tried it myself yet, but I'm planning on only enabling graphics enhancements.