i think the design is really good, it would be cool if you see the people from the events on the screen or maybe in a little portrait, the partner has a lot of potential, it need more interactions, a system where he loses his mind, and you need to help him, or a betrayal system, where you need to keep the trust on each other.
An interrogation system could be good, an officer stop you on the way, and you need to lie really good, the character start sweeting, your partner start a fake story and you need to follow up, and the story need to be concise, for the officer to believe it, or maybe your character start telling the story, and you just need to wipe the sweat from his face, fix his expressions and posture, and there's it a lie thermometer in the screen.
Just some ideas that come to my mind, i don't know what direction you want to take. Overall the game is simple, kind of repetitive but really polish, it has a lot of details