Okay so the updated world 2 is literally impossible to beat :
You were supposed to bring a key and a Baba for the transform, but because of the row of fires, the other Baba would die instantly. You can't bring a rock since you need two keys and you can't open a door if a rock is on top of a key and bringing two Babas from one level is impossible to do.
I had to move the flag one space down because of that.