The chats are a great idea, I can see a lot of possibilities for a good storyline since you're using them, take advantege of it for the series. Also, I like the way you explain the use of things like the card reader, but sometimes it's good to have the player figure out what to do by their own for a bit, ok?
I think people are already pointing out this game is very submachine. The way you walk through scenes and the music has a lot to do with it. You could try to make this a little more yours. What bugs me the most is the cube. A lot of point-and-click games are using cubes nowadays. Not that it's bad or anything, but it got so much overused it's getting annoying...
It's a good game. I wish I could play more of this. Just keep in mind you can be successfull by doing your own things and have your own ideas. I missed originality.