The Norwegian landscape gets put to its proper use in "Flukt", where it's ancient look makes it easy to believe that what you are watching is taking place in the middle ages.
The two girls playing the leads do a great job portraying scared, but level headed, girls. The "grown-ups" did a good job too, but some of these characters were reduced to mindless goons. The movie is quite short on dialog, and some of it was pretty bad. Enough was said to keep the story going, but a little more would maybe added some (needed) depth to some of the characters.
I guess you could say the plot is a series of close calls (but which action movie isn't?), and the movie sometimes takes some shortcuts for simplicity. Especially one sequence in the end would have gone down much differently if just any of the characters had said something.
While the locations used for filming were really good, it was sometimes hard to feel that they connected with each other, and because they were so different (rocks, forests, mountains, plains) it was sometimes hard to place them right next to each other (even though they very well could have been).