The platforms and elevators are guarded by creatures ( also known as Zubs ) but each planet has a different sub-species - for example the first level 's Zub resembles a gyroscope whilst he fourth level Zub is a fish . The platforms and elevators are guarded by creatures confusingly known as Zubs but each planet has a different sub-species - for example the first level 's Zub resembles a gyroscope whilst he fourth level 's is a fish .