The Dirt house with the anvil roof represents how society is slowly decaying and will soon collapse due to the weight of everything it's built on top of its self.
The sponge pool is representative of a modernist society that simple creates drama to drink it in in self created horror.
The tree is representative of everything that once was good and green in this world.
The end fruit is representative of the new corruption that will soon kill the tree.
The idea is that post modernism is depressing and stupid.
And Reggles said I should mention something about the duality of man.