This... is really, really cool. The 2D-3D look and white-with-black-outlines suits a minimalistic look, emphasizing that the world they're in is long dead. The animation is smooth and rough at the same time, and the minimalistic environments that are built here look superb and do well in showing, not telling us what the world is largely like. And the fact that Bulb is there to provide a more comedic contrast to Andy is even better.
The character design is so simple, yet full of, well, character makes ME want to design one, in fact.