The gameplay was quite fun and the concept was very intriguing. As the music got darker and darker I questioned what I was doing with these children? It was very intriguing, wondering whether I was helping them or whether I was doing something horrible to them xDD.
Though I did like the music intensifying as you completed each puzzle, I feel like the game could have used sound effects. Since its a paper world maybe you could make sound effects out of paper and then edit them?
I was also about to suggest an indicator of where the children are if you are stuck for a long time (maybe more than 3-4 minutes?) but GoldenDonkeyProductions already suggested that. XDD
Other than that it was really fun! Good job!