Puff and Blow each have a Methane Gas Gun which fires a cloud of immobilising gas. If this comes into contact with a bad guy he will be absorbed into the gas and then float around the screen for a limited time. Bad guys are harmless in this state. Puff and Blow must suck the floating gas clouds into their guns and blast them out against a vertical surface. Bad guys then turn into bonuses which can be collected. Be warned! - the gas cloud dissolves with time after which baddies become active again and extremely annoyed.