There are many bugs around that are trying to eat you, so collect power ups to punch the bugs and kill them. Grab the coins and diamonds to gain points.
Punch the flowers until they spit out seeds, catch and carry the seeds to the portal.
When Ubisoft showed off Ghost Recon Advanced Warfighter earlier this month, we weren't allowed to talk about the multiplayer section of the game at that time. Now we can, and Ubisoft and its Red Storm studio (which is developing the multiplayer section) have clearly thought about what players liked about the original GRAW's multiplayer, because they have built upon it considerably.