Fall Guys is a platform battle royale game developed by Mediatonic and published by Devolver Digital. There is a prototype that the existence was confirmed thanks to this video: https://www.youtube.com/watch?v=2ky3cSCLe there are only some footages, but the build is lost.
Footages in 1 video: https://www.youtube.com/watch?v=01ZBzHMvVCE&t=28s