World one, Fire world (Yes lets start off here, since it is part 2, why not continue after bowsers castle) and with the bulk of world one being focused on escaping the cloudy death thats in one of the earlier stages, and if possible some air boat like stages,
and for nostalgic feel, make the first stage, the first 2 land stages from SMB (1-1 and 1-3) but re-vamped, this will be the only re made stage in the whole game,
the revamp includes, anywhere that there is no land, its replaced with lava, and with fireballs jumping out from these areas. Also, with bullet bills getting bigger near the end of the stage, till they are the size of the massive ones. In this mix, we include more enemies, and dry bones. The 3 star coins will be located at the second gap in 1-1 (the one with missing earth, now filled with lava), the second in the huge land gap thats in 1-3 (if its possible to have that land mass, I dont remember seeing moving platforms like in smb) and the final coin, under the stairs, but the massive bullet has to ruin the stairs to see it.
Next for level 2, its a regular stage, but its on a airboat, and it its full of boxes, its a delivery airboat, so naturally its going to be swarmed with canons and goombas to block all intruders, most of the boxes are filled with koopa's troopa's (if possible) so, to find the 3 star coins, you have alot of breaking to get through. Ill have the concept art later on,
thats all I got for right now.
