Send all other players falling to their doom by destroying the floor
Keep mobile. Staying still will increase your chances of getting killed. As an extent of this, at the beginning of the game, do not try to kill other players; it leaves you exposed to being knocked out yourself as you stop to draw your bow. Only focus on killing your competitors once the numbers have fallen enough for you to keep an eye on all the remaining players at once. Remember, you don't usually get rewarded for killing players, but for surviving for as long as possible.