Complex sentence: Above all this, the Zots get faster and faster up to a certain limit, and at higher levels, they can even pass through walls-this is not a glitch, the manual refers to this as "Zot magic".
Split into simpler sentences: Above all this, the Zots get faster and faster up to a certain limit and at higher levels they can even pass through walls. This is not a glitch, the manual refers to this as "Zot magic".