That's a cool game! Could not solve the puzzles that are placed right before the ocean and the... house? with ladders thing. It is a really good game, nice puzzles, with quite pleasant music. If you added some story to it and polished accordingly to the audience's feedback, it would deserve to be sold for some dollars at Steam!
One bug I want to mention, is that if get to the hub world and you are in the sea, your character upon spawning will have character's sprite and not a boat's one.
And this thumbnail - it's super cute!