The object of the Combo Factory is simple; make the longest running combo you possibly can while defending yourself.
You have an arsenal of attacks and items and items you can purchase to get the job done.
Be sure to check out the Walkthrough as well for examples of some of the amazing combos you can create.
As Always, Good Luck and Have Fun.
Move: Arrow Keys
General Attack & Combos: A
Quick Kicks: Hold A
Place Item: Z