Gwen and Ruby are seen riding to Elderly Acres on Cat's bike, but the bike is only for one person.
Sam ate the "plum figgel", which is a dragon fruit in the real world, by biting directly into it. Dragon fruits aren't meant to have the outer shell eaten.
In the ending credits, Gwen and Ruby are calling for help in the alley, but they would know how to get out since the fake policeman led them in.