The Dink Network

On the very first island, I can see a 'raised area' that has a barrel and a stat potion, but I have walked around that thing for hours, and can't find a way to get them. What is the secret or obvious clue I am missing? I hate to move on without getting them!

Also, a blue potion is stuck in a tree - can't punch it down, buttstomp it down, or blow it up.

And an area of stones in the middle of pine trees, also un-blow-up-able.

Any/all clues, hints welcome. Happy new year~

Thanks!!