Wow. These worlds are a lot shorter than I remembered. I'm already at the second castle. I'm making pretty good time, I guess. 
On the other hand, they just get harder. 

The world of Mario is one crazy place. DyRE was totally right about that one. 
Still, it's a <i>good</i> crazy.

It feels weird to play this one, though. Not being able to move to the left is a little weird. The music is slightly different from the original, too. 

But you have to love that Mario theme music.