Great example of how simplicity can sometimes be the best! There's no fancy graphics or crazy spectacles at work, but the concept is brilliant and the execution delivers. I usually don't love puzzle games but this one stuck with me. Also, the fact you made it on a phone is crazy - nice work!
My only feedback would be to work on the art style: there's an awkward blank space in between the buttons and the game, and the game as a whole feels a little bit disconnected in terms of art.
Besides that, this is a strong entry - I really enjoyed playing and this was an impressive interpretation of the theme!