Revealing mistake: After Carmen rescues Juni, as they fly over the city she says, "Hang on butterfingers." In the following close-ups, where is the handcuff with the broken chain on Juni's wrist? He is not wearing it on either wrist in any of these close-ups. It's obviously back in the following shots.
Continuity mistake: When Juni and Carmen sit in the park, as Carmen holds the locating device, Juni holds the Floop and Fooglie figures and starts to set them down. In the next shot, the Fooglie is already down, but Juni now holds the Third Brain, its small sack with the long cords and Floop. The position of the backpack changes between shots as well.