The objective in Mad Karate Man is pretty straightforward. Get the highest score you can by smacking this office guy, quite literally, off the face of the earth.
In the beginning you won't be able to get much of a score and your first final blow will be pathetic. But horde up those mad points, get all those upgrades (there are lots of upgrades) and soon you'll be able to make smoking craters with your fists! Use the mouse and follow the on-screen instructions.