Start at level 1 and focus on grabbing the powerups, which look like pinkish white glowing lines (you might think they were bullets). I got this on level 4 if I remember correctly. The hardest level to grab powerups on is level 2 since the angle of the playfield makes it hard to see. If you screw up and miss one you can restart or keep going since levels 5 and 6 have a lot of powerups so you might pick it up there.