To get in the house, be brave as Sheriff Roy in "Fastest Blender in the 
West." Be as bold as Captain Bob in "Cannibal Buffet of the East." Be as 
clever as the tailor in "vampire Penguins of the North". Couple that with 
the fact that the mailman has a particular peculiarity about it.

You don't need the ladder to cross the bridge. All you need is what's in 
the house. Explore it some more.

To get explore more of the area around the beach, try swimming.