It took about half an hour to download it for me, I think. I started doing something else partway through.
It should be noted that in Super Mario Bros. 2 (The Lost Levels), Luigi controls are altered from Mario's. His jump is higher, while his "steering" is looser. And yes, it's very noticeable. Did the SNES version play this way, too? I don't recall it, nor do I recall it on the GB version, but it's possible I was just ignorant.
I think it's fair to consider The Lost Levels as an expansion to the first game, especially anywhere besides Japan. I mean, look at the dubbed name - The Lost Levels. They're practically saying it right there. Does this make it bad? Not in any way. If you like the original Super Mario Bros., and can handle a challenge, this game is for you.
It's about as much as an expansion as Halo 3 is upon Halo 2, only it has more levels that its predecessor, really. And it was made in what, '88?
As for Sin and Punishment, I figured out the way the controls flowed pretty quickly, with one exception: How do you sword things? I know it's possible, I've seen it on youtube, so it has to be true. I think I've tried all the buttons, though, so I must be missing how the timing works.