My oh my, how this picture reminds me of my childhood. You just don't see cartoons like these these days. The artist clearly recreates the cartoon as how the original looked, bringing back youthful memories to whoever loved this little dog.
Every little emphasis within this piece displays Courage's number one emotion: fear. From the distorted figure right down to the screaming uvula and the fleas jumping from his fur, no little detail was omitted, even the hole in his tooth. Even without too much shading, the great details and the contrast with background really draw the eye of the viewer.
Remembering back to how the original cartoon was depicted, the artist has this wonderfully rendered, with no real grievances to be had. As I had, I'm sure there were many other people who stopped and giggled as this wonderful picture brought back blissful memories.