ATTINY45 Music box need help!

i saw this project. can anyone help me to make it?

i want to play this song on it:

I went to Youtube and found the video. In the description is a link:

It gives theory and links for the circuit and code (page bottom) which is AVR assembly but includes a hex file.

I am not experienced in the assembly but guess that it could be wrapped to compile with Arduino IDE if changing the tune requires compiling which I can't see how it won't as there's no place to store the tune but on the chip.

I'd like to see this made more accessible. I might even be able to learn from it. I also wonder how close this is to Coding Badly's chip music player.

This music box is based off the one above but coded in Arduino IDE to run on a Sparkfun Micro.