The image was meant to reveal emotions (mainly expressed by the piano) of a person that is living in a world that sometimes doesn't make sense,...Architecture-wise, people are starting to live in ant farm-like-continuously taller buildings, in a non-Eco friendly environment dominated by concrete beasts/giants (represented by the scary towers and the bridge), the towers made out of stacks of cubicles (pixels) representing the way we live in towers...But again, there are some people, who prefer the nature-friendly simple life (the wooden nature-reminding log).
The fish tank is also a representation of the way the sea-life has been damaged which takes us again to the sustainability issue.
Also you can note the complexity of today's life in the pixels of the tower versus the simplicity shown in the foreground.
