Wall yellow goo is the first type of yellow goo encountered in Swindler.
Wall yellow goo is a thin layer of goo that covers flat surfaces. It has many bubbles, and appears to be able to take on the shape of most or all different forms.
They are very similar to the Cooked orange enzymes.
When the player touches the goo, a set of jaws will form immediately from-the-go and snap at it. If swindler does not move out of the way fast enough, the mouth will eat it and the player will have to start the level over. Because of this, it is not only a hazard, but a deadly one. It is relatively easy to avoid, however.