This is really great in just about every aspect. For me, the most striking part is the artwork and the characters. Everything looks like a lovingly made cartoon or comic, and it's impressive how your style is visible through each character's distinct look and mannerisms. I wound up matching with Sue and it actually felt like talking to someone I'd be friend with in real life. I think that's an awesome achievement. I would have played this game for much longer to see how the relationships could develop.
As far as constructive criticism is concerned, I only have two points. I would've liked a bit more variety and consistency with the sound. When the background loop fades out during the conversations, it pulls you out of the immersion. I think it could have been good to find way of incorporating other sounds as well, maybe as feedback for a characters positive or negative reaction. Just a thought. :) Oh, and also I'm sure this was more of a time issue, but it felt unnatural to have all of the same dialogue options for each person. More variety would have helped with the immersion.
Regardless, this is really fun and slick to play. Great work!