Reaaally cool game! I love the concept and it fits the theme perfectly well. It is a bit frustrating to have to restart the whole game when screwing up something, and also not to have the possibility to split the screen to view both character.
I found one ending, and one (two?) secret: Going on the rigth of the "slave room" with one character, and going to the left of this room with the other character. But I could not go with both at the same time, and I was stucked with the second one... Is it linked with the other ending?
In any case, congratulation!