adding music and display score

[theawsomeavr]

hi, the first time i used your code was a miracle that it had work that well and since 2017 i wanted to add the tetris theme to it....... until now.
i have done a modification to your code so that it can play music at the same time it is updating the game without any external IC or MCU, all is done with the atmega328p.
The sound is outputted through pin 9 of the arduino.
Code and schematic: https://github.com/theawsomeavr/Arduino-tetris
Video: https://youtu.be/EBNhFzYwQ5M
hope you like it :)