Great game! I didn't get very far in it but I really like the aesthetic. The gameplay is really smooth too, even though I feel a little bad leaving the small keys behind. Music is not distracting and sound effects did a good job letting me know that the keys have been separated.
I feel that even though the movement controls are interesting, it doesn't add much to the game. I feel more frustrated than fun having to move my hand all over my keyboard constantly.
Overall, it's an enjoyable game with a great deal of polish done. Great job!