You can have five players per team (four plus the goalie), which you control with your arrows and J, K, and L keys. Each player can pass, shoot, and clear.
You may be surprised by Slam Soccer's peculiar style (players wear hats and even sunglasses) and crazy 'Career Mode', where you'll start playing on a dirt field with goals marked out by trash cans. You can even bribe the ref.
Teams don't have their real names, although the game's creators have found some pretty similar titles. The stadiums include ambient noise and the games feature a commentator.