You can play Fall Guys in a99.io as unblocked.
Similar to Fall Guys: Ultimate Knockout, what you need to do in Fall Bros game is to reach the end point before everyone else. In some games, you have to be very careful not to fall down. You can move with "W, A, S, D" Keys. You can jump with the "SPACE" key. You will jump to the next level after every 1 game.