2.2 to 2.1

Maybe someone can relate, but after i first got my introduction to SRB2 and its history, i grew a liking to what came before. Though i dont understand why, Maybe because of the art or the music, does anyone have a reason why i think this?

I specifically made this account because I'm unsure of how I would go about doing this. I had spent around 4 hours yesterday learning zone builder and how to start working on a map. I'm wanting to make a conversion of the 2.2 maps to put into 2.1, however I'm unsure of how I would go about...