Neat concept and nice art, music and voice acting.
I just guessed for all my deliveries and ended off with a character telling me they're expecting another letter before the game told me I delivered them all, lol. House numbers, or letting us know the character names, or even a very barebones map with limited info on it would be nice just to give some leads to start (tho I'm sure you know all that and were the jam longer things would have been different)
Nice work everyone!