Woow! what an exciting and creative game idea!
The overall mechanic of having to strategize while keeping an eye on the beats is really cool! But I would have wished for the difficulty increasing through the beats getting more complex and harder to time rather then having tougher enemies and bigger maps, because the timing became a bit monotone after a some time, while the map felt like having to stay as close to the kid as possible or having to be in multiple places at once.
Despite these wild suggestions the game still is very aesthetically pleasing and has got a fun concept behind it.