Forest of Self
The Forest of Self is Blue's realm within the Red Code. The Forest is inhabited by a host of wildlife, and violence is forbidden, although Blue himself does not always abide by this rule. The Forest is also the avenue through which Valor enters the Red Code after replacing Green as one of the dreamers.
Originally, the forest was planned to have enemies called Corruption Machines that polluted the soil and chopped down trees, but they were scrapped.
The Forest of Self was designed around Valor's body. The entrance to the Plains is Valor's head, his heart blocks the entrance to Heart Cave, and portions of his hands can be seen in the beginning area.
Within the Dark Forest is a table with a rainbow table cloth. This is a reference to rainbow tables, which are precomputed tables used for cracking password hashes.
In the Descent, aliens from Space Invaders can be seen floating in the background.