I finished Inside two days ago, but I still don't know what I played. I have so many questions and theories, and I'm savoring the time spent mulling them over without discussing them with anyone, or reading anyone else's take the game. I've asked Matt to play the game as well, and I think we may record the playthrough and the discussion that results. I'm eager to see his reactions and how they compare to my own.
If you have any interest in visual storytelling, play Inside. If you have any interest in audio storytelling, play Inside. You should really just play Inside. Because I have to see what you think of it, and I need to catalog it somehow. We'll work on that.