Imaginary Friend: 8-Bit Night
Pixelprospector points the way to where Retro Souls have released a demo (bottom of the page) of their moderately cute conceptual platformer, 8-Bit Night. The concept is pretty simple: the 2D level can be flipped around to be played by your "mirror" character. This character moves in a mirror image of your own movements, allowing for some impossible access to bits of the map and a way of creating/sidestepping ingenious puzzles. But which one is the "real" character!? It's all so confusing. There's a video of the game below for those who have no inclination to play the thing.