[Warning: 100% spoilers]
So the complete walkthrough is:
The plug
The common dildo
The door handle
Then go downstairs. There's nothing to do for now, proceed to the kitchen by clicking the bottom of the game screen
Click on the phone to summon 4 more weird characters.
Now go to backyard and fuck the shy bee guy, then that guy on the left of him, and get back to the foyer.
Now we're dealing with the two most unobvious things in the game: the handrail tip and the carpet. The basement is pointless right now. Just use the handrail and go back to the shark guy.
The next is devil guy.
Than the thing in the basement.
The devil guy again.
Finally, we've reached the final part of game's content - click on the front door.