Not using continues at all, but they reset the score anyway, it wouldn't be wise to use them
I am running the game from A600 using WHDLoad. Unfortunately I have no other way to run it.
I remember the framerate did drop when playing on my old computer 20+years ago, and Ronald Pieket even mentions it on his interview with Codetapper, but I really don't remember when it happened. It doesn't too often, but often enough to be a problem.