The Retro World a.k.a. Floing Void
The Retro World, also known as the 'Floing Void', is a rift in time and space. It makes up Chapter 7 of Wonderland Adventures: Mysteries of Fire Island, as stated by the official solutions page.
Retro World resembles The Void in Wonderland Adventures, however, there are some differences. Firstly, there is no music playing, secondly, the pillars emit small red star particles, and finally, the Stinkers that travel to the Retro World. Guggenheimer and the player note that it somehow feels different than the void, saying without a doubt that it is something else.
Guggenheimer feels the presence of Floing magic strongly in the region, and urges the player to use a Floing Orb on a nearby pillar. Upon doing so, an Adventure Star appears, leading to the first Wonderland level, "First Steps".
There are ten adventures in the Retro World. Upon completion of "First Steps, Revisited", a bridge leading to four more pillars becomes activated. Upon completion of those, a bridge opens leading to four more pillars, however these ones lead to Classic Trilogy-style Adventures. Upon completion of those, the final pillar is reachable: a level entitled "Remembering Shorty", which is a memorial to Wonderland Discussion Board member 'Shorty' who passed away due to illness.