Pang is a fixed screen game, originally released as arcade. It can be played with one or two players, and the other player can join anytime within the game. The goal is to destroy the balloons which bounce around the playfield. To accomplish this, you can shoot hooks which travel upwards, and blow up any balloon they touch, causing them to either split into smaller ones, or evaporate if they're at their minimum size. (mobygames.com)