That was fun and tense. I felt intense dread and fear the whole time, I almost wanted to even stop moving and hide in a corner.
The character zipping around all over the place made it tough to avoid doppelgangers sometimes, I'd run right into them before even getting a chance to see them...Which is terrifying, but also felt a bit unfair.
I countered this by stopping and looking around often. It was satisfying to shatter mirrors and made me feel like I had a real impact on the game, interactivity is great.