Waterfall store Z1W3 bugged?
best chance is by doing a dodge jump v+spacebar at sametime while you run to the door from the big mushroom platform thingy. it is hard because of the acid waterfall.
I know your problem. You have to dodge jump from the furthest place of the leaf that you can reach.
I got there today it was working fine with just jumping from the leaf before the waterfall, took me only 3 tries.