Press the mouse button to drop trousers and jump onto the copier. Stay there long enough for the copy to complete but release the mouse button to jump down if someone sober comes by the door or you will get caught and fired, hence game over. You have to make a copy every so often because the longer you go without making a copy, the drunker you get. If you get too drunk, you will fall over, which also get you fired and lose you the game. See how many copies you can make before getting caught.