Nice job, Kees! The animation and cinematography were both quite good! I also really enjoyed how you did the overlay of the map as they were journeying, I thought that looked cool. Also, the ending was perfect! Didn't see it coming, but it was dramatic and made me think. Great message as well as a nice film. Good job to the voice actors too!
I did think that the story felt a bit rushed at times. There should probably be a bit more in between the main moments of the film. Perhaps better transitions from one scene to the next would be of benefit. Another minor thing that I noticed was a really short spot of black video where two shots weren't connected in your timeline perfectly (towards the beginning of the film).
The sets for your film were also good by the way. I would suggest however that you make your backdrops look less obvious. In the scenes on the beach, this could be done by simply making some sand "hills" in front of where the backdrop comes to the base plate. In addition to this, moving the backdrop further away from your set instead of directly connected will help it to be blurred out more in your shots, giving it a more realistic feel.
Congratz on finishing a longer project and making it come together! Look forward to seeing more from you.