I really liked the idea. Using your mental health as the end point was nice. I think that with a little more difficulty (like people searching for you or something like that), this game would be much more fun to play. Other than that, It was pretty fun too play, it was cute and spooky at the same time, and the transitions between different mental states was really well executed. Pretty good game!
As a side note, I'm not sure if I'm the only one but, whenever the volume of the game was lowered betwen menu transitions, my browser's volume did the same. I was using YouTube... weird...