I tried this game a couple times but always got caught on some issue or another, unfortunately. The input boxes often don't work, the click-boxes of images are commonly a decent ways off from their intended position, and I wasn't sure of the input format needed to answer the intersection questions until I read the comment down here.
All that said, your game poses an interesting challenge that I think could work really well with mysteries hidden just a bit deeper. Clues laid a bit more carefully than a single voicemail with the intended solution could lend themselves to a really fun investigation.
The audio and the visuals are very cohesive. I especially love the family tree illustration (shoutout to Philthy Phil Marsh).
This game is clunky, but I like all its bones!