Tempest

Your object in Tempest is simple: you must clear a web of enemies by killing them all, or lasting a preset amount of time. Your arsenal consists of endless shots, and 2 superzappers, that if timed right, take out every enemy on the web. If an enemy makes its way up the web to where your ship is, and touches you, you lose a life. As you progress through the game, the web takes on new shapes.