Well someone else did it so someone must be interested logic.

Okay people find a huge body of water, then from the huge body of watter the dive the purpose is to jump up reach a branch of a tree and hit the oponent while standing on a branch of tree with a spear//and not to kill the oponent.
The next point is their is only 1 spear.
And lastly if opponents pick the same branch they can attempt to throw each other of, but may not spear each other.
He who hit's the most and is hit the fewest wins.
Lastly people propel them selves from the watter and not from the ground.

Things that may surprise you:It's not again the rules to use metal spears,
If you die you basically forfeit the game and hence can't be he who wins the game.
If you die because of a lack of attention you loose.
If you kill your oponnant the entire team losses, if you are not playing with teams you loose.
teams don't have to be evenly sized, but the sum of the rank of the larger team has to be equal or smaller then the sum of the rank of the next smaller team and so forth.
If you can you have to accept any skilled player or player from the same family to be on your team.