Bubble Bobble

is an arcade game by Taito, first released in 1986. It was ported soon for numerous home computer and game console. The game features two twin Bubble Dragons, Bub (Japanese "Bubblun"), who is green with yellow spikes/horns and Bob (Japanese "Bobblun"), who is blue with cyan spikes/horns. Together, they journey through the Cave of Monsters to rescue their girlfriends. They move over a system of platforms, busting and pushing bubble, avoiding enemies and collecting a variety of power-up. The main reasons that many computer or game console ports of this game - even when released several years after the original - can seem lacking and incomplete in some aspects is because the original arcade game, despite its apparent simplicity, features some rather complicated and convoluted game mechanics. Each level (or round) consists of one screen, with no scrolling or flipping. The dinosaurs can move around the levels by walking on platforms, falling through empty space, jumping through platforms... full article at wikipedia