When you want to refer the game to the player you use game.getplayer(). In the campaigns you might see glob.player, this is because in the begining of the control.lua files the devs set glob.player = game.getplayer(). probably because it is simply easier to type than game.getplayer(). This is fine ...

I found out about this game from TheZemalf: http://www.youtube.com/watch?v=wR8WFT7J ... eZemalf%29