To get past the house with the fog at the begening of the game you have to get to the tornado aroung the mailbox on the second side of the fence.
Go to the house and turn toward the wall and jump.
Go back to the begening and touch the mailbox and get the tornado.
Go back to the house push start and go to the item menu and get the tornado.
The tornado will clear the fog were you can go on.
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