If you loved Girl vs. Monster, try Teenage Mutant Ninja Turtles III
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Stuart Gillard, and they both carry the playful mood tag, and they sit in Comedy / Family / Science Fiction territory. If that's the register that drew you to Girl vs. Monster, the second film will land in a comparable space — through a different lens.
playful
What Teenage Mutant Ninja Turtles III is
What this franchise needed was temporal paradox. Our heroes get flung back to feudal Japan and have to stop a war. At least it gives the turtles a change of scenery, if not much else.

