How to get to the east island without an umbrella. It seems the speedrun strat for that has been "patched" out.

It keeps respawning you above the water, over and over. You can't do anything! Also hitching a ride on the sailboat is annoying since it doesn't push you along, but I guess that's a limitation of the engine.

is this a bug or a weird artistic decision?

I have 49 coins and i can't find last one. I run around and don't see glow anywhere wwith my amulet. I checked two times if there's no fruits on the trees but don't see any, unless there's secret tree somewhere. Any idea which coin i might be missing?

So I don't want those hand-holding walkthroughs, but I'm stuck on a point in the game. I currently have one moon and one of the gems, but I am stuck. What am I supposed to do at this point?