I think this was a quaint concept that was well-written. I thought it was realistic - I was glad to see that (spoilers ahead) Joseph couldn't convince Keith to talk to his classmates. Yeah, in reality I think someone like Keith would be difficult like that.
This is subjective but I thought that too much was stated rather than shown at times. For example, the part that explicitly mentioned Keith's introversion felt too unsubtle. That trait was already inferred from his actions.
There's no audio and the drawings are a bit rough around the edges. These things do hurt the presentation of the game.