All subsequent sheets follow a pseudo-random formation, generally moving down the screen but at various speeds and with greatly varying levels of firepower for each individual enemy.
This means the strategy must change to looking to find which enemies are descending fastest and picking them off while also trying to break up big groups.
They are called, in order of appearance, Cyber, Spazmoid, Galactic Hulk, Hep-Hep, Graber, Bum-Fluff, Phantom, Orb and Mega-Bod.
Most similar games of the time will only let you fire again when the previous laser bolt has either hit an alien or left the screen.
So sharpen your wits, tighten your sweatband and give it a whirl" (issue #1.08, May 1984)[3] The spiritual sequel to Positron, the scrolling shooter Syncron (1987), was also noted [by whom?]