Try to punch your opponent as many times as you can before he does it to you and bage you all your life. You can play with your friends on the same screen.
Hit the zombie that comes out of the pipe and you will earn points, but if you hit a human you will lose points. The player with the most points at the end of the time will win.
Make the character reach the end without losing all his lives and kill the monsters that get in front of him. Grab the letters inside the boxes to get momentary power-ups that will help you get there better.