I think the concept of your game was very interesting! I did assume from the get-go that the person was the doppelgänger, due to the way the tutorial message was written. Of course it's just a jam game and there's never enough time for anything, but I'm sure this concept would be so cool with multiple cases! So you really are never sure, who you're dealing with, the moral implications of accusing someone of being a doppelgänger when they're not... So many possibilities!