Awwww, what a lovely game. Absolutely my favorite so far! I am moved after finishing the whole game and seeing they finally played together. There is no narrative, but the story is absolutely clear and well told.
The idea is very smart switching between to perspectives and solve the puzzle together. Map scoping and difficulty level is just about right and does not hurt the engaging feeling and explorations. The visual you created and the sfx you picked fit in very well! It is almost like a Childhood memory (not sure if you've listened that music from Robert Schuman lol).
Wonderful plot and great finish!