Really interesting game. I'd echo what others have said, it's a bit confusing to play without a tutorial or some more information to give the player on what's going on. I'm also unsure of what the choose a character thing does when it seemed the characters to choose from were already there.
Once I did start getting a handle on what was going on, it was really interesting. I think there's a good chance this could be a very addicting little puzzler if it were more clear!