First off: this game is hilarious and engrossing even if you're not among its intended teenage audience. Unlike other interaction fiction formats that excel at simulating places or actions, the chat medium is excellent at simulating friendships with all the back-and-forth free flowing camaraderie and gossip.
There were a bunch of genuine laugh out loud moments: (Spoiler - click to show)the running weasel gag was great and I almost fell off my chair at the option to say 'YOLO, bloodsucker' to my soon-to-be-vampire friend. It was a perfectly pitched moment.
The medium of chat messages is a challenging sphere to write for: in a story comprised of dialogue all descriptions have to be naturalistic, all exposition has to fit into what a person would report. Felicity makes excellent use of images to show people and places that the characters wouldn't describe in words.
The setting sports an intriguing (and sometimes slightly twisted) reimagining of werewolves, sorcerers and vampires. The supernatural world is learned about through steady immersion and by the 3rd day more and more of its secrets click into place.