Yardley has been greatly interested in comics for most of his life, as well as the Sonic the Hedgehogvideo game series. In fact, the reason why he professionally spells his name with an "!" at the end is a tribute to Scott Shaw who spells his own name the same way, and he was one of the first artists whom worked on Archie Comics' Sonic the Hedgehog.
He mostly works with Ian Flynn on the Sonic the Hedgehog series, sometimes himself writing script for the series.
One of Yardley's first known, original comics was a series known as Nate and Steve, on which he worked with three of his friends.