Achievement Guide:

PRIMA = Dream Planet

PENGUIN = Oh, a Penguin

KILL = Mr. Crab

COCO34'S WORLD (Yes, you must actually type COCO34'S WORLD, not just COCO34) = A giant creepy eye

GFFF = Cosmonaute

P.S. Check out planet Daclus and follow the story. It's really fun!