The main objective of the game is to get someone to look at your genitals and accusing them of being homosexual by calling them a faggot, then following a firm kick to the arse. No matter what, you must call them a faggot, otherwise the game loses it's whole meaning.
In the movie, Raddimus describes the several positions to a newcomer at Shenaniganz. He explains that there are several different positions with different difficultly levels. As the difficultly level rises so does the number of kicks you can give your victim.
Here are the positions:
1. "The Flash And Go"
The player plainly pulls down his pants, allowing time for his victim to appreciate it, then bringing the pants back up. For that, you get one kick.
2. "The Brain"
Here you isolate your testicles with your fist, forcing them forward against the skin to resemble that of a brain. For that, you get 2 kicks.
3. "The Bat Wing"
This is where you take the excess skin of your genitals and stretch them out until it is flat like paper. Now you should be able to see some vains and the slight resemblance to a bat wing. For that, you get 3 kicks.
4. "The Goat"
What Raddimus describes as one of the more "Trickier" moves of the game. What you do, is you palm your penis into your hand and you stretch it behind you so that it is visible from the cavity between your anus. For that, you get 4 kicks.
Now these are just the basic positions. But as the movie quotes, "We're always looking for creativity, so when you got a little down time to yourself, play with your nuts, you might just create a new move."