Squares

This was finished a long time ago. Please bear with me, I wrote this in 8th grade so... yeah.
Part of the prologue (please read the actual prologue; it makes more sense):

Nothing had seemed unnatural until the arena started falling apart. Only a handful of players had survived, and no fans were allowed to leave. Every exit to the outside was locked. Cell reception had been scrambled, and no one knew what was going on.
The game he and his friends played was very much like dodgeball - only with swords instead of using your hands. The teams would hit the balls at each other in an effort to get all the players on the opposing team out. I won't bore you with the details.
After the arena collapsed, some members of the attendants started to kill the others in any way possible. Some had knives, some plainly snapped the other's necks. But there was one other thing; the killers did not kill each other.