In My Mind is a small games experience designed to represent what it's like living inside Charlie's head. The gameplay involves the player walking around a room and interacting with furniture to talk out loud to themselves. This is a direct representation of how Charlie talks to themselves to sort through various thoughts and problems.
All of the dialogue has been pulled directly from Charlie's own mental health blog, which they've kept since they were first diagnosed with Bipolar. The game doesn't follow any sort of linear pattern of events and each person would experience their thoughts in a different order. This is to represent the disjointed nature of Charlie's own thoughts. They have aimed to create the experience of the player having to put these thoughts together themselves to better understand their experiences.