It is a rather unique game.
The story is very deep and deals with very serious psychological issues in a way that hooks you and makes you want to find out what exactly is going on and why all the quirky things you experience throughout the game happen.
The gameplay could be more elaborate. The emotions in the fights are interesting since they fit very well with the theme of the game, although in the end it's a simple rock paper scissors.
There are also areas in the Headspace that become a little heavy and unnecessarily long.