I am surprised that there are so many of these puzzle differences games on this website. It's just that after playing many, I'm not that interested. It was pretty weird how you also worked a story into this. What is cool is the fact that the drawings were actually very well done and detailed. The music was very pleasant and gave off a good sense of a lullaby. I'm in no mood to sleep, but can know what it's like to want to.
It's interesting to look at how many different things there are in a scene. It's like when you realize you don't actually see most of them all at once. It takes many glances to get down every single detail. I am glad you managed to achieve score success with this. Next time, you could probably make it a little more detailed with more variety.