Attiny85 midi music in a Clock

My first music electronic player that can play 4 voices. 

The music clock part list:

1 x Attiny85

2 x AG13 Batteries 1.5 volt each

2 x 100 Ohm resistors

2 short wires to connect to the clock button and speaker

1 x analog alarm clock (The clock already have the speaker and push button)

The circuit for Attiny85.

And the circuit diagram

And here is the source code

Next:

-  I will be doing a SD player all in Arduino IDE. 

- An app to convert midi file to hex for play in the source code.

Credit to 

1. http://www.technoblogy.com/show?Q7H