I've noticed the game lacks music and wanted to suggest something cool.
There's a music creator in california that produces a lot of songs INCLUDING detective/investigation like music.
And as far as i've seen, it's free to use if your project is not commercial. If you want to commercialize it in the future, you can just give them a donation. The value is also up to you.
Here's his rules:
https://www.fesliyanstudios.com/faq
Examples of his work: