Your character is the small blue circle. The goal your trying to score on is the red one. The other blue corcle is yhour teammate, while red is the opponent. Play to 10. Your character follows your mouse, while the others are AI. Press space for a charged kick.
[UPDATE] The ball texture was bad so I changed it, as long with the sizes of the players and the ball itself. Also, I noticed the kick power was weak, so I added a charged kick too.