That's fine, i'm glad you enjoyed the game! Sadly we had no time to make any devlog or something like that, the closest thing to that would be our quick video reports that we used internally to communicate with each other during the development process. I can share some of them with you, but please, do not translate the titles - they are pointless :)
Also here's the link to the OST if you need:
https://youtube.com/playlist?list=PLV7DbdQexNQEMHv-hZpx-gKEqK_QcQrDP