it's a great game to watch..
go check out the youtube explanation of the game..
but it's easy..
you are not allowed to throw the ball, you have to punch the ball
away..
catch a kick on the full, you get a free kick
kick the ball through the 2 centre posts = 6 points
between the centre post and outside post = 1 point
running with the ball, ball must touch the ground every 10
metres
that's about it 
