Loved it. Found your game mentioned in a YouTube video by nexpo (which I again found through the /r/LiminalReality subreddit).
I have a special feeling for liminal spaces and this is a game that handles this topic pretty well and in an innovative way. It's a seamless experience that breaks some walls to our reality to get to its conclusion. Really like the approach.
Although the ARG is over, I found the clues to get to the other ending (thanks, hive memory of the interwebbs). The walk with the dog was a surprise and set quite the mood.
Good stuff. Thank you.