Reproducing original Mario levels in Mario Maker?

Solution 1:

I would say that for some worlds, yes it's possible.

Take world 1-4 from the first Super Mario Bros game. Here is a video of a near exact replica (with a few differences in textures and the floating bridge above Bowser at the end is longer than the originals) with the level ID in the description. For comparison, here is a video of the original game.

There is also a Reddit for worlds 1-1 and 1-2. They provide the level ID's, but whether or not they are exact I'm not sure since I can't play them. It's mentioned that they are as close as possible to the originals with the exception of the limitations imposed in Super Mario Maker.