Great design and sound design. Playing it is emotionally impactful. I understand there is sometimes no map in real-life escape settings during war, but I do think this would be helpful to add to your game. I found myself getting really lost and having to navigate a huge playing field to try to find my way out and interact with NPCs to have an answer.
I said this during a previous round of playtests, but it could also help to clarify the boundaries of the game so that the player knows where they can walk or where they will be blocked. Maybe in addition to/instead of the map, you could have text call-outs that explain to the player where they should go next. For instance in the scene where you blow the horn (also can't remember if there was a horn sound effect?), it could say something "The soldiers stationed above are coming your way! Make your way to the port before they make their way to you."
Finally, the game could close on the arrival of the person at a refugee camp/border patrol rather than just ending on the boat. This will drive your point that the person is traumatized and will face further hardships home.