Ummmm... I think I've become a play tester for the game at this point...
I found two points to get out of bounds. One is a square blue building just left of the player's home. 
It... doesn't have a hitbox? A boundry? You can just walk through it.
The other out of bounds area is at a yellow building found after going to the camera store, then taking a left turn. It has a tree in front of it, but the tree isn't placed close enough to the building to prevent the player squeezing between it and the structure to go out of bounds.
Extra: Me in the void, falling eternally (at least till I quit the game)
