Awesome polish! Thank you. I really like how the music reacts to the gameplay.
One suggestion from me - I don't understand what those colorful tiles are for... I don't think I saw it explained somewhere in the game. At first I thought those were the only places where I could place the pieces.
The automatic placement of the tiles make it a bit too easy - at later stages I was just clicking wherever there is free space. That reduced the logical part of the puzzle. Maybe it can be implemented as a power up? Like a temporary boost?
Good luck!