At any time press escape to go to the main menu. 

There are 2 gameModes

An axe throwing game, where you use the left mouse button to control Super Acttion Power Dude's Mega-Grip(tm) with the left mouse button. And the Objective is to hit the target with the sharp end of the axe.

And then there's Missile Badminton. The Missile is serving and you must defend your part of the field with a metal bat.