Nice and refined piece! I like almost everything: the music, the art, the colors, the website and the UI were done with care and diligence, I really like :)
However, I found the game tedious and quickly wanted to stop playing, but my daughter actually liked it and continued playing for a long time, and I realized I was just being lazy :D
In my opinion, it would be better if the game gave more feedback, such as highlighting which item has changed, when the player failed. Also would be nice if it was more generous with a second chance, and allowed us to start again from the latest level instead of starting from scratch.
Anyway, it's still a nice piece that I enjoyed looking and listening the song, so, keep doing it that you're in the right path!