In this video game, characters are walking in front of a house. While walking, they may enter, leave, or change direction. The objective is to know how many are inside, despite disturbing visuals.
Various techniques are useful in this game, for example: if you see a character going inside, while two are getting out and another enters, it is simpler to find out there is nothing to do, rather than counting...
I hope you will enjoy playing with it as much as I liked making it!
PS: Thank you to the neuropsychologist Carole Greber for the original idea.