the game-play structure follows those of classic shoot 'em ups of the 80s, also known as golden age of arcade games, and resembles first and foremost the game-play of asteroids. it follows a simple and intuitive game-play pattern. the player, acting by the avatar plobb throughout the game has to navigate around the bubbles that come crossing the screen and to aim shots at them by spitting in their direction. the player navigates plobb by placing the cursor in the direction of or directly on the target towards which plobb will then move to and upon left mouse click also will emit shots. the speed with which plobb moves increases with the distance of the cursor to the actual position of plobb on the screen. the bubbles differ in size and react to being shot at by dividing into two smaller bubbles until disappearing completely. if plobb is touched by an enemy bubble he will lose energy.