The Splitting by Fireberry Studio
Links: Official Site
Release Date: Jan 2015 (Chapter 1), Sep 2016 (Chapter 2)
ABOUT THIS GAME
The Splitting is an episodic mystery adventure game about people and their reflections.
Daniel wakes up one morning to find that his reflection is gone. Now, with his reflection missing, he discovers that he can pass through mirrors into the identical mirror-world.
There are currently 2 chapters released (out of 5 in total) and they are completely free to play online!