The game that teaches you that smiling at someone in public is an anomaly. This is a really fun (and cheap at $4) experience where you walk through the same hallway scene over and over and look for differences to help you escape.

I'm seeing from other reviews that this is a genre of games, but this is my first of these "spot the difference" type games and I had a lot of fun with it. Some differences are super obvious and others are very subtle. The very subtle ones will have you 2nd guessing whether you actually missed the anomaly or not in each pass-through. This makes a fun but tense playthrough, hoping you can get that number to keep climbing to 8 and escape.

I would love to see a sequel to this with multiple environments!