Spug Shock has you shooting at little brown sacks that come floating at you from the right hand side of your screen. Use your magic wand to vanquish the sacks before they run past you or else you'll lose health. You only get three health markers to start with. Sometimes you'll get a little power up to shoot at, other times the sacks will seem impossible to shoot and you'll notice those are of a darker color. You switch levels every time you fulfill the counter in the upper left hand side. The sacks keep coming faster and faster and you'll be pressed to keep up or die!