Mr. Bilney has been doing tessellations for decades. His work is best-known for its Australian themes, correct anatomical proportions, and natural, graceful, biologically correct outlines instead of the blocky, unrealistic, stylized lines favored by many tessellation artists.
There's a history behind this piece of art. Bruce originally named it "Skippy", presumably in reference to the 1967 TV show of that name. He renamed it "Quantum Leap" as a joke response to another animated tessellation, "Quantum Dog", by renowned tessellation artist Makoto Nakamura. Mr. Bilney's original tessellation animation is much more complicated than the version you see here.
"Quantum Leap" as Mr. Bilney originally made it and "Quantum Dogs" are unusual because each frame of the animation is a valid tessellation. In the gray background of the picture you see on this page, my reworking of "Quantum Leap" only shows the first of 5 tessellations. If you could freeze the picture each time the kangaroo moves, you'd see a yellow kangaroo shape that can be repeated to form a tessellation.
You can see much more of Bruce Bilney's tessellation art at his website, Ozzigami.com.au