[Android Rhythm Game ] Zappiano - Published my first Game! (Looking for untamed feedback)

Hi,

I have just published my first game (android) and developed It solo!
It is a piano rhythm game similar to Piano Tiles:

https://play.google.com/store/apps/details?id=com.jogoware.Zappiano

I would like to receive comments if you could help, both good and/or bad ones, pros x cons, etc, including title, presentation, gameplay, sound, etc! Please do not hold back :)!

Thank you!

It follows a couple of screen captures: