Don't Fall io is a multiplayer survival game with one goal written right in its name. All players start on a platform made of geometric tiles, stacked in several layers, and the only rule is: do not fall.
Every tile you step on disappears shortly afterwards, and the same is true for every other player. Keep running, because standing still means dropping through. When you fall through one layer, you land on the next one down. Fall off the last layer and your game is over. The number of players still in the race is shown at the top of the screen. Outlast everyone to win.