Screw

Screws are hostile entities that can be encountered in some levels. Murphy has to avoid them, as being captured by one is fatal. They are vulnerable to being hit by falling objects. They explode when hit. Screw movement is predictable, as they always try to follow their left side. When no solid objects are available - they continuously turn left, making them spin around 2x2 area.

Screws are very similar to snik-snaks, but they cannot be turned or guided, making them much more dangerous and harder to control.

Explosive

Screws can be used as explosives to open new paths to access vital areas. They also chain-explode and carry the explosion polarity. Usually this involves Murphy dropping a zonk on a roaming screw.

Hitting

Screws always explode when hit with a zonk. Infotrons are also fatal, but if not in every case. When infotron hits the screw when it is leaving the tile below – the infotron will land on the screw and drop down when the screw leaves the tile completely.