Gingiva

Gingiva is an RPG Maker game created by indie developer myformerselves. It serves as a sequel (though probably taking place before, or possibly not) to the developer's first game, Middens, with several reappearing themes and characters.
Set in the same surreal dystopian setting as Middens, you play as Gingiva, a young woman with an old fashioned clock winding key for a head, who is essentially an enslaved automaton factory worker. The story begins with the "Holy Mother Most High" requesting your presence; when you speak with her, she accuses you of slacking off in your work, and has you thrown in prison.

However, in your prison cell, you meet with a sentient, disembodied mouth referred to as "the Chatterteeth" who helps you escape. Now on the run from the evil corporate executives, you must make your way through a bizarre, corrupted world filled with danger, in a quest to regain both your freedom, and your humanity.