Boredom and me being a sadist created this. I based this hack off of the infamous Super Mario Forever rom. You'll notice that if you get past World 1-1, World 1-2 of Super Mario Forever is present. SMF's got an ASM hack in it, I believe, that enables that first jump to be made, and that's what I built this level around.
is the IPS. Apply it to an unedited US/JPN SMB1 rom and you should be good to go.
I've also put up a video on Youtube. However, I urge you to give this at least a shot before watching the video, as it shows how to do much of everything. (in fact, I exploited my way through the first jump. You're supposed to run and gun your way through the top instead of what's shown in the video.)
Apparently, Youtube thinks it's a good idea to waste 3 hours of my life in uploading time by instantly deleting my video the second I put it up. Go figure.