Very nice, I really felt like I was investigating a crime!
Post-jam, a better UI, graphics and sounds could make it great. It's hard to recognize the characters, to know what they are doing, and the desk because messy pretty fast! It all comes in the way of the investigation work.
I think there could also be a way to navigate through the tapes more easily than with rewind and fast forward, like a cursor? Check out our game, we use one :p