In fact, Cawthon used to do similar antics with releasing the games, sometimes making cryptic posts or misdirections on Steam only to release the game the next day. It's obviously aimed at a younger audience, and it reminds me a lot of Scott Cawthon and the Five Nights at Freddy's games. If you like the 8-bit style designs and the simplistic visuals and gameplay then it might be up your alley. The shock release of the project managed to take social media by storm, causing Toby Fox and Undertale to trend.
