The p8 files are in p8sourcecode.zip, which you can download.
It can't fit in just one p8 file though. There was an older single-cart version, but it could only fit 3 tracks, and the title screen was very basic.
I did download the p8 files, however I was asking since I wished to be able to play this game on an emulator on my cello hon called picpic and after some investigation, the emulator doesn’t support multi carts, so I wondered if it was possible for a single cart, but I’ll wait for the multi cart support which is eventually coming, thanks for your reply :)