An interesting game. I especially like its presentation . the whole phone environment is simulated pretty convincingly with lots of nice touches and side information. AndI loved uncovering more about Sara's life. However the second half was, in my opinion, trying to hard to be scary and disturbing. I would appreciate more subtle story progression that would slowly introduce player into some creepier stuff instead of just some murder cult (although I admit that maybe I didn't decipher a lot of hidden messages here). For example after you read Sara's messages with her mom it would be great if you would later receive messages or a call from her dad (whose contact can actually be found in the phone).
But a good start so far. I wish you luck with this in the future.