Yikes the (Ending A related spoiler)7th stage is weird. What triggers the orbs to start following you? I know the javelin will make them teleport behind you but it seemed like they would randomly start chasing me down. I didn't have many lives to experiment there since I tried (and failed) to get to the second airship in the hard level of world 5.
It felt like just a time related thing. If you were on the same screen as one for too long, it'd just come after you.
Quoting for the new page.Giantbombs quicklook is up!
http://www.giantbomb.com/videos/quick-look-volgarr-the-viking/2300-7958/