Hey just finished your game and well i'm quite confused. In one hand i really liked the dialogues and the interactions with objects etc, but in the other hand it is bearly playable du to the physics system ... I'm quite sure you used a rigidbody for that, but don't forget to mark it as "kinematic" because otherwise your rigidbody will be simulated physically instead of by code. At some point it became even worse and i could not play anymore, you could even go through walls well it was quite a mess.
I had a lot to say, but you have potential so keep up the good work !