It could be called a courtyard of memories
or
The dump of forgotten memories.


By using some new item in the area or floor of the house you can open the door to go behind the house where you can obtain an item (related to the legend of bumbo)

Upon achieving this, there's a scene in which Isaac remembers playing with his father and his figures.
Out of nowhere, the father figure and the figures transform into horrifying creatures.


The boss can summon less powerful versions of the boss Bumbo and Greed.
He would launch baseball-shaped projectiles.

At half health, the mother's voice will be heard, and puppets of one angel and one demon will appear while the mother's legs crush anyone, whether enemy or Isaac.

The dolls in the battle of the angel and the demon attack each other but do not receive damage from each other.

Between the angel and devil dolls, one area would heal you half a heart every 30 seconds, and the other would do half a heart of damage every 15 seconds.


While the boss is halfway through his life, an argument is heard in the background where the mother argues with the father about how they play with those satanic dolls and that it is better for him to play with his toys in the form of angels or read the Bible while the father says something like leave him alone for a moment and stop talking so much about religion.