The Gasguy is an enemy that sprays a green gaseous cloud. If Young is touched by this cloud, the screen is distorted slightly, and all of the controls are inverted for a short period of time. The Fumigation Ghost can pass through walls, and can give three-point health drops when killed.

When a Silverfish is hit by the gas cloud, the Silverfish will in panic for a short period of time, and then die.