There's one glitch I found. If you go to the really tall tower where you learn how to fly and you walk in, then you jump against the left wall to get to the platform, the view changes so you're seeing it from the outside even though you never went outside.
Anyone get the rocket ending? You have to get the cigarette, and just before you get back to your house, hold down space so your character gets tired and leans down. His cigarette will light a string connected to a box next to his house and you'll launch to the moon.