You know what, I read this at night yesterday, reached end of Chapter 2 and... had nightmares after that! Seriously! It just drills into depths of your mind! And I must say one thing: I read your stories before and you are a genius, a grandmaster of plot building. This thing is better than mixed "Saw" series and "Cube" series. A relation to these two movie series was my first thought.
It only needs some improvements:
1. Like many people mentioned the "S" needs to work fluently, sometimes I have to mash it numerous times before the dialogue proceeds;
2. Something creepy: looks like you forgot to draw Alice's right eye at the end of Chapter 2;
3. The text needs further polishing, because there are still lexical, grammar and punctuation errors.
I could help you with that, just let me know.